feat: Add error handling for invalid token in JwtAuthGuard

src/modules/auth/guards/jwt.guard.ts

@@ -47,9 +47,13 @@ export class JwtAuthGuard implements CanActivate {
 				algorithms: ["RS256"],
 			});
 
-			let user = await this.userService.findByProviderId(
-				verifiedToken.sub.toString(),
-			);
+			if (typeof verifiedToken == "string")
+				throw new UnauthorizedException("Invalid token");
+
+			let user = await this.userService.findOrCreateByProviderId({
+				providerId: verifiedToken.sub.toString(),
+				username: verifiedToken.preferred_username,
+			});
 
 			request.user = user;
 

src/modules/user/user.service.ts

@@ -45,6 +45,31 @@ export class UserService {
 		});
 	}
 
+	async findOrCreateByProviderId({
+		providerId,
+		username,
+	}: {
+		providerId: string;
+		username: string;
+	}) {
+		let user = await this.prisma.user.findUnique({
+			where: {
+				providerId,
+				username,
+			},
+		});
+
+		if (!user)
+			user = await this.prisma.user.create({
+				data: {
+					providerId,
+					username,
+				},
+			});
+
+		return user;
+	}
+
 	async create(createUserDto: CreateUserDTO) {
 		return await this.prisma.user.create({
 			data: {