Feature/refactor validateAnonymousLogin to simplify promise handling

apps/api/src/app/auth/auth.service.ts

@@ -17,8 +17,6 @@ export class AuthService {
   ) {}
 
   public async validateAnonymousLogin(accessToken: string): Promise<string> {
-    return new Promise(async (resolve, reject) => {
-      try {
     const hashedAccessToken = this.userService.createAccessToken({
       password: accessToken,
       salt: this.configurationService.get('ACCESS_TOKEN_SALT')
@@ -29,19 +27,13 @@ export class AuthService {
     });
 
     if (user) {
-          const jwt = this.jwtService.sign({
+      return this.jwtService.sign({
         id: user.id
       });
+    }
 
-          resolve(jwt);
-        } else {
     throw new Error();
   }
-      } catch {
-        reject();
-      }
-    });
-  }
 
   public async validateOAuthLogin({
     provider,
@@ -75,7 +67,7 @@ export class AuthService {
     } catch (error) {
       throw new InternalServerErrorException(
         'validateOAuthLogin',
-        error.message
+        error instanceof Error ? error.message : 'Unknown error'
       );
     }
   }