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Call it once at startup, then use the returned function in your framework's middleware\u002Fhook system.",[616,617,623],"pre",{"className":618,"code":619,"filename":620,"language":621,"meta":622,"style":622},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { createAuthMiddleware } from 'evlog\u002Fbetter-auth'\n\nconst identify = createAuthMiddleware(auth, {\n  exclude: ['\u002Fapi\u002Fauth\u002F**', '\u002Fapi\u002Fpublic\u002F**'],\n  include: ['\u002Fapi\u002F**'],\n  maskEmail: true,\n})\n","server\u002Fmiddleware\u002Fauth-identify.ts","typescript","",[608,624,625,658,665,690,726,747,761],{"__ignoreMap":622},[626,627,630,634,638,642,645,648,651,655],"span",{"class":628,"line":629},"line",1,[626,631,633],{"class":632},"s7zQu","import",[626,635,637],{"class":636},"sMK4o"," {",[626,639,641],{"class":640},"sTEyZ"," createAuthMiddleware",[626,643,644],{"class":636}," }",[626,646,647],{"class":632}," from",[626,649,650],{"class":636}," '",[626,652,654],{"class":653},"sfazB","evlog\u002Fbetter-auth",[626,656,657],{"class":636},"'\n",[626,659,661],{"class":628,"line":660},2,[626,662,664],{"emptyLinePlaceholder":663},true,"\n",[626,666,668,672,675,678,681,684,687],{"class":628,"line":667},3,[626,669,671],{"class":670},"spNyl","const",[626,673,674],{"class":640}," identify ",[626,676,677],{"class":636},"=",[626,679,641],{"class":680},"s2Zo4",[626,682,683],{"class":640},"(auth",[626,685,686],{"class":636},",",[626,688,689],{"class":636}," {\n",[626,691,693,697,700,703,706,709,711,713,715,718,720,723],{"class":628,"line":692},4,[626,694,696],{"class":695},"swJcz","  exclude",[626,698,699],{"class":636},":",[626,701,702],{"class":640}," [",[626,704,705],{"class":636},"'",[626,707,708],{"class":653},"\u002Fapi\u002Fauth\u002F**",[626,710,705],{"class":636},[626,712,686],{"class":636},[626,714,650],{"class":636},[626,716,717],{"class":653},"\u002Fapi\u002Fpublic\u002F**",[626,719,705],{"class":636},[626,721,722],{"class":640},"]",[626,724,725],{"class":636},",\n",[626,727,729,732,734,736,738,741,743,745],{"class":628,"line":728},5,[626,730,731],{"class":695},"  include",[626,733,699],{"class":636},[626,735,702],{"class":640},[626,737,705],{"class":636},[626,739,740],{"class":653},"\u002Fapi\u002F**",[626,742,705],{"class":636},[626,744,722],{"class":640},[626,746,725],{"class":636},[626,748,750,753,755,759],{"class":628,"line":749},6,[626,751,752],{"class":695},"  maskEmail",[626,754,699],{"class":636},[626,756,758],{"class":757},"sfNiH"," true",[626,760,725],{"class":636},[626,762,764,767],{"class":628,"line":763},7,[626,765,766],{"class":636},"}",[626,768,769],{"class":640},")\n",[605,771,772,773,776,777,779,780,783],{},"The function signature is ",[608,774,775],{},"(log, headers, path?) => Promise\u003Cboolean>",". It resolves the session, calls ",[608,778,613],{},", captures timing into ",[608,781,782],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[785,786,346],"h2",{"id":787},"options",[605,789,790,791,798],{},"Inherits all ",[792,793,795,797],"a",{"href":794},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[608,796,613],{}," options",", plus:",[800,801,802,821],"table",{},[803,804,805],"thead",{},[806,807,808,812,815,818],"tr",{},[809,810,811],"th",{},"Option",[809,813,814],{},"Type",[809,816,817],{},"Default",[809,819,820],{},"Description",[822,823,824,845,864,883],"tbody",{},[806,825,826,832,837,842],{},[827,828,829],"td",{},[608,830,831],{},"exclude",[827,833,834],{},[608,835,836],{},"string[]",[827,838,839],{},[608,840,841],{},"['\u002Fapi\u002Fauth\u002F**']",[827,843,844],{},"Route patterns to skip (glob).",[806,846,847,852,856,861],{},[827,848,849],{},[608,850,851],{},"include",[827,853,854],{},[608,855,836],{},[827,857,858],{},[608,859,860],{},"undefined",[827,862,863],{},"If set, only matching routes are resolved.",[806,865,866,871,876,880],{},[827,867,868],{},[608,869,870],{},"onIdentify",[827,872,873],{},[608,874,875],{},"(log, session) => void",[827,877,878],{},[608,879,860],{},[827,881,882],{},"Called after successful identification.",[806,884,885,890,895,899],{},[827,886,887],{},[608,888,889],{},"onAnonymous",[827,891,892],{},[608,893,894],{},"(log) => void",[827,896,897],{},[608,898,860],{},[827,900,901],{},"Called when no session is found.",[785,903,905],{"id":904},"skip-the-routes-that-do-not-need-a-session","Skip the routes that do not need a session",[605,907,908],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[616,910,912],{"className":618,"code":911,"language":621,"meta":622,"style":622},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[608,913,914,930,939,954,967,981,988],{"__ignoreMap":622},[626,915,916,918,920,922,924,926,928],{"class":628,"line":629},[626,917,671],{"class":670},[626,919,674],{"class":640},[626,921,677],{"class":636},[626,923,641],{"class":680},[626,925,683],{"class":640},[626,927,686],{"class":636},[626,929,689],{"class":636},[626,931,932,934,936],{"class":628,"line":660},[626,933,696],{"class":695},[626,935,699],{"class":636},[626,937,938],{"class":640}," [\n",[626,940,941,944,946,948,950],{"class":628,"line":667},[626,942,943],{"class":636},"    '",[626,945,708],{"class":653},[626,947,705],{"class":636},[626,949,686],{"class":636},[626,951,953],{"class":952},"sHwdD","     \u002F\u002F Better Auth itself\n",[626,955,956,958,960,962,964],{"class":628,"line":692},[626,957,943],{"class":636},[626,959,717],{"class":653},[626,961,705],{"class":636},[626,963,686],{"class":636},[626,965,966],{"class":952},"   \u002F\u002F Public endpoints\n",[626,968,969,971,974,976,978],{"class":628,"line":728},[626,970,943],{"class":636},[626,972,973],{"class":653},"\u002Fapi\u002Fhealth",[626,975,705],{"class":636},[626,977,686],{"class":636},[626,979,980],{"class":952},"      \u002F\u002F Health checks\n",[626,982,983,986],{"class":628,"line":749},[626,984,985],{"class":640},"  ]",[626,987,725],{"class":636},[626,989,990,992],{"class":628,"line":763},[626,991,766],{"class":636},[626,993,769],{"class":640},[605,995,996],{},"For high-traffic apps, flip the model and only resolve sessions on routes that need them:",[616,998,1000],{"className":618,"code":999,"language":621,"meta":622,"style":622},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[608,1001,1002,1018,1046],{"__ignoreMap":622},[626,1003,1004,1006,1008,1010,1012,1014,1016],{"class":628,"line":629},[626,1005,671],{"class":670},[626,1007,674],{"class":640},[626,1009,677],{"class":636},[626,1011,641],{"class":680},[626,1013,683],{"class":640},[626,1015,686],{"class":636},[626,1017,689],{"class":636},[626,1019,1020,1022,1024,1026,1028,1031,1033,1035,1037,1040,1042,1044],{"class":628,"line":660},[626,1021,731],{"class":695},[626,1023,699],{"class":636},[626,1025,702],{"class":640},[626,1027,705],{"class":636},[626,1029,1030],{"class":653},"\u002Fapi\u002Fdashboard\u002F**",[626,1032,705],{"class":636},[626,1034,686],{"class":636},[626,1036,650],{"class":636},[626,1038,1039],{"class":653},"\u002Fapi\u002Faccount\u002F**",[626,1041,705],{"class":636},[626,1043,722],{"class":640},[626,1045,725],{"class":636},[626,1047,1048,1050],{"class":628,"line":667},[626,1049,766],{"class":636},[626,1051,769],{"class":640},[605,1053,1054,1056,1057,1059,1060,1063,1064,1067,1068,1070,1071,1073],{},[608,1055,851],{}," and ",[608,1058,831],{}," use glob patterns (",[608,1061,1062],{},"*",", ",[608,1065,1066],{},"**","). Provide both if you need granular control, and ",[608,1069,831],{}," wins over ",[608,1072,851],{},".",[785,1075,1077],{"id":1076},"react-to-identification","React to identification",[605,1079,1080,1081,1083],{},"Use ",[608,1082,870],{}," to react to user identification, for example to force-keep logs for premium users via tail sampling:",[616,1085,1087],{"className":618,"code":1086,"filename":620,"language":621,"meta":622,"style":622},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[608,1088,1089,1105,1132,1168,1195,1200,1205,1222,1247,1252],{"__ignoreMap":622},[626,1090,1091,1093,1095,1097,1099,1101,1103],{"class":628,"line":629},[626,1092,671],{"class":670},[626,1094,674],{"class":640},[626,1096,677],{"class":636},[626,1098,641],{"class":680},[626,1100,683],{"class":640},[626,1102,686],{"class":636},[626,1104,689],{"class":636},[626,1106,1107,1110,1112,1115,1119,1121,1124,1127,1130],{"class":628,"line":660},[626,1108,1109],{"class":680},"  onIdentify",[626,1111,699],{"class":636},[626,1113,1114],{"class":636}," (",[626,1116,1118],{"class":1117},"sHdIc","log",[626,1120,686],{"class":636},[626,1122,1123],{"class":1117}," session",[626,1125,1126],{"class":636},")",[626,1128,1129],{"class":670}," =>",[626,1131,689],{"class":636},[626,1133,1134,1137,1139,1142,1144,1147,1149,1152,1155,1157,1160,1162,1165],{"class":628,"line":667},[626,1135,1136],{"class":632},"    if",[626,1138,1114],{"class":695},[626,1140,1141],{"class":640},"session",[626,1143,1073],{"class":636},[626,1145,1146],{"class":640},"user",[626,1148,1073],{"class":636},[626,1150,1151],{"class":640},"plan",[626,1153,1154],{"class":636}," ===",[626,1156,650],{"class":636},[626,1158,1159],{"class":653},"enterprise",[626,1161,705],{"class":636},[626,1163,1164],{"class":695},") ",[626,1166,1167],{"class":636},"{\n",[626,1169,1170,1173,1175,1178,1181,1184,1187,1189,1191,1193],{"class":628,"line":692},[626,1171,1172],{"class":640},"      log",[626,1174,1073],{"class":636},[626,1176,1177],{"class":680},"set",[626,1179,1180],{"class":695},"(",[626,1182,1183],{"class":636},"{",[626,1185,1186],{"class":695}," _forceKeep",[626,1188,699],{"class":636},[626,1190,758],{"class":757},[626,1192,644],{"class":636},[626,1194,769],{"class":695},[626,1196,1197],{"class":628,"line":728},[626,1198,1199],{"class":636},"    }\n",[626,1201,1202],{"class":628,"line":749},[626,1203,1204],{"class":636},"  },\n",[626,1206,1207,1210,1212,1214,1216,1218,1220],{"class":628,"line":763},[626,1208,1209],{"class":680},"  onAnonymous",[626,1211,699],{"class":636},[626,1213,1114],{"class":636},[626,1215,1118],{"class":1117},[626,1217,1126],{"class":636},[626,1219,1129],{"class":670},[626,1221,689],{"class":636},[626,1223,1225,1228,1230,1232,1234,1236,1239,1241,1243,1245],{"class":628,"line":1224},8,[626,1226,1227],{"class":640},"    log",[626,1229,1073],{"class":636},[626,1231,1177],{"class":680},[626,1233,1180],{"class":695},[626,1235,1183],{"class":636},[626,1237,1238],{"class":695}," anonymous",[626,1240,699],{"class":636},[626,1242,758],{"class":757},[626,1244,644],{"class":636},[626,1246,769],{"class":695},[626,1248,1250],{"class":628,"line":1249},9,[626,1251,1204],{"class":636},[626,1253,1255,1257],{"class":628,"line":1254},10,[626,1256,766],{"class":636},[626,1258,769],{"class":640},[605,1260,1261,1262,1264,1265,1267,1268,1270],{},"Hooks fire after the session is resolved and ",[608,1263,613],{}," has set its fields. They run on every request that passes the ",[608,1266,851],{},"\u002F",[608,1269,831],{}," filter, so keep them fast and side-effect-free.",[1272,1273,1274,1279],"tip",{},[605,1275,1276,1277,699],{},"Common patterns for ",[608,1278,870],{},[1280,1281,1282,1286,1289],"ul",{},[1283,1284,1285],"li",{},"Force-keep audit logs for admins or high-value plans.",[1283,1287,1288],{},"Tag the request with feature flags or tenant info loaded from the session.",[1283,1290,1291],{},"Increment a per-user counter for billing.",[785,1293,1295],{"id":1294},"what-happens-when-auth-fails","What happens when auth fails",[605,1297,1298,1299,1302,1303,1056,1305,1308],{},"The middleware catches every error from ",[608,1300,1301],{},"getSession"," and logs nothing, so your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[608,1304,782],{},[608,1306,1307],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1310,1311,1312],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":622,"searchDepth":660,"depth":660,"links":1314},[1315,1316,1317,1318],{"id":787,"depth":660,"text":346},{"id":904,"depth":660,"text":905},{"id":1076,"depth":660,"text":1077},{"id":1294,"depth":660,"text":1295},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1322,1325],{"label":369,"icon":372,"to":370,"color":1323,"variant":1324},"neutral","subtle",{"label":383,"icon":112,"to":384,"color":1323,"variant":1324},{},{"title":374,"icon":377},{"title":600,"description":1319},"W5iPJDKIMXykmBxrqRGnyCbSUGNKZLZjNw0Sw3TEzU0",[1331,1333],{"title":369,"path":370,"stem":371,"description":1332,"icon":372,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":379,"path":380,"stem":381,"description":1334,"icon":330,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1789076908165]