Update get_*_column functions

Use getattr instead of model_to_dict in single columns. We might want to
change the functions later on so peewee's ForeignKeyField primary key
shorthand like model.server_id instead of model.server.server_id
will work.

This will very likely increase performance of the get_*_column functions
due to not having to call the model_to_dict function from Peewee's
helper library.

app/classes/models/roles.py

@@ -66,10 +66,9 @@ class HelperRoles:
     @staticmethod
     def get_role_column(role_id: t.Union[str, int], column_name: str) -> t.Any:
         column = getattr(Roles, column_name)
-        return model_to_dict(
+        return getattr(
-            Roles.select(column).where(Roles.role_id == role_id).get(),
+            Roles.select(column).where(Roles.role_id == role_id).get(), column_name
-            only=[column],
+        )
-        )[column_name]
 
     @staticmethod
     def add_role(role_name):

app/classes/models/servers.py

@@ -144,10 +144,10 @@ class HelperServers:
     @staticmethod
     def get_server_column(server_id: t.Union[str, int], column_name: str) -> t.Any:
         column = getattr(Servers, column_name)
-        return model_to_dict(
+        return getattr(
             Servers.select(column).where(Servers.server_id == server_id).get(),
-            only=[column],
+            column_name,
-        )[column_name]
+        )
 
     # **********************************************************************************
     #                                     Servers Methods

app/classes/models/users.py

@@ -165,19 +165,10 @@ class HelperUsers:
     @staticmethod
     def get_user_column(user_id: t.Union[str, int], column_name: str) -> t.Any:
         column = getattr(Users, column_name)
-        return model_to_dict(
+        return getattr(
             Users.select(column).where(Users.user_id == user_id).get(),
-            only=[column],
+            column_name,
-        )[column_name]
+        )
-
-    @staticmethod
-    def check_system_user(user_id):
-        try:
-            result = Users.get(Users.user_id == user_id).user_id == user_id
-            if result:
-                return True
-        except:
-            return False
 
     @staticmethod
     def get_user_model(user_id: str) -> Users: