Return error if the currently created user is equal to the admin user.

.github/workflows/lint.yml

@@ -5,6 +5,7 @@ on:
   pull_request:
     branches:
       - 'main'
+name: Lint rust
 
 jobs:
   cargolint:

.github/workflows/pr-build.yml

@@ -1,4 +1,5 @@
 on: [pull_request]
+name: Test rust
 
 jobs:
   build_and_test:

.github/workflows/test.yml

@@ -7,6 +7,7 @@ on:
   pull_request:
     paths:
       - 'src/**'
+name: Test rust
 
 jobs:
   build_and_test:

src/gpodder/auth/authentication.rs

@@ -46,12 +46,9 @@ pub async fn login(
 
     if let Some(admin_username) = &env.username {
         if admin_username == &unwrapped_username {
-            if let Some(admin_password) = &env.password {
-                if admin_password == &digest(password.clone()) {
-                    return Ok(HttpResponse::Ok().json("Login successful"));
-                }
+                return Err(CustomError::Conflict("The user you are trying to login is equal to the admin user. Please\
+                 use another user to login.".to_string()));
             }
-        }
     }
 
     let user = User::find_by_username(