diff --git a/apps/server/src/auth/auth.service.ts b/apps/server/src/auth/auth.service.ts
index 487f89b7..122df9a3 100644
--- a/apps/server/src/auth/auth.service.ts
+++ b/apps/server/src/auth/auth.service.ts
@@ -200,6 +200,10 @@ export class AuthService {
     }
 
     if (
+      this.configService.get("OPENID_AUTHORIZATION_URL") &&
+      this.configService.get("OPENID_ISSUER") &&
+      this.configService.get("OPENID_TOKEN_URL") &&
+      this.configService.get("OPENID_USER_INFO_URL") &&
       this.configService.get("OPENID_CLIENT_ID") &&
       this.configService.get("OPENID_CLIENT_SECRET") &&
       this.configService.get("OPENID_CALLBACK_URL")
diff --git a/apps/server/src/auth/strategy/github.strategy.ts b/apps/server/src/auth/strategy/github.strategy.ts
index 7425c6de..f258a372 100644
--- a/apps/server/src/auth/strategy/github.strategy.ts
+++ b/apps/server/src/auth/strategy/github.strategy.ts
@@ -33,11 +33,11 @@ export class GitHubStrategy extends PassportStrategy(Strategy, "github") {
     if (!email) throw new BadRequestException(ErrorMessage.InvalidCredentials);
 
     try {
-      const user =
+      user =
         (await this.userService.findOneByIdentifier(email)) ??
-        (username && (await this.userService.findOneByIdentifier(username)));
+        (username ? await this.userService.findOneByIdentifier(username) : null);
 
-      if (!user) throw new Error(ErrorMessage.InvalidCredentials);
+      if (!user) throw new BadRequestException(ErrorMessage.InvalidCredentials);
 
       done(null, user);
     } catch {
diff --git a/apps/server/src/auth/strategy/google.strategy.ts b/apps/server/src/auth/strategy/google.strategy.ts
index ff446d4b..9c06c654 100644
--- a/apps/server/src/auth/strategy/google.strategy.ts
+++ b/apps/server/src/auth/strategy/google.strategy.ts
@@ -33,11 +33,11 @@ export class GoogleStrategy extends PassportStrategy(Strategy, "google") {
     if (!email) throw new BadRequestException(ErrorMessage.InvalidCredentials);
 
     try {
-      const user =
+      user =
         (await this.userService.findOneByIdentifier(email)) ??
-        (username && (await this.userService.findOneByIdentifier(username)));
+        (username ? await this.userService.findOneByIdentifier(username) : null);
 
-      if (!user) throw new Error(ErrorMessage.InvalidCredentials);
+      if (!user) throw new BadRequestException(ErrorMessage.InvalidCredentials);
 
       done(null, user);
     } catch {
diff --git a/apps/server/src/auth/strategy/openid.strategy.ts b/apps/server/src/auth/strategy/openid.strategy.ts
index 97cf958e..ec9cb7a2 100644
--- a/apps/server/src/auth/strategy/openid.strategy.ts
+++ b/apps/server/src/auth/strategy/openid.strategy.ts
@@ -37,7 +37,7 @@ export class OpenIDStrategy extends PassportStrategy(Strategy, "openid") {
   ) {
     const { displayName, emails, photos, username } = profile;
 
-    const email = emails?.[0].value ?? `${username}@github.com`;
+    const email = emails?.[0].value ?? `${username}@openid.com`;
     const picture = photos?.[0].value;
 
     let user: User | null = null;
@@ -45,11 +45,11 @@ export class OpenIDStrategy extends PassportStrategy(Strategy, "openid") {
     if (!email) throw new BadRequestException(ErrorMessage.InvalidCredentials);
 
     try {
-      const user =
+      user =
         (await this.userService.findOneByIdentifier(email)) ??
-        (username && (await this.userService.findOneByIdentifier(username)));
+        (username ? await this.userService.findOneByIdentifier(username) : null);
 
-      if (!user) throw new Error(ErrorMessage.InvalidCredentials);
+      if (!user) throw new BadRequestException(ErrorMessage.InvalidCredentials);
 
       done(null, user);
     } catch {