fixed key loading and logout func

goodchain/src/classes/User.py

@@ -17,10 +17,10 @@ class User:
 
         # check if user exists
         if user:
-            private_key, public_key = Signature.bytes_to_keys(user['private_key'], user['public_key'])
+            private_key, public_key = Signature.bytes_to_keys(user[0], user[1])
             self.private_key = private_key
             self.public_key = public_key
-            self.username = user['username']
+            self.username = user[2]
             return True    
         return False
 
@@ -44,9 +44,7 @@ class User:
         return False
     
     def logout(self):
-        self.db.close()
         self.private_key = None
         self.public_key = None
         self.username = None
-        self.password = None
         return True