Update:

backend/application/users_model.py

@@ -2,17 +2,19 @@ from . import db
 
 
 class Users(db.Model):
-    __bind_key__ = 'flaskaled-srv1'
+    __bind_key__ = 'db-users'
 
     id = db.Column(db.Integer, primary_key=True, autoincrement=True)
     email = db.Column(db.String(), nullable=False, unique=True)
+    nickname = db.Column(db.String(), nullable=False)
     hash_pass = db.Column(db.LargeBinary(), nullable=False)
     salt = db.Column(db.LargeBinary(), nullable=False)
     is_admin = db.Column(db.Boolean, default=False, nullable=False)
 
-    def __init__(self, email, hash_pass, salt, is_admin):
+    def __init__(self, email, nickname, hash_pass, salt, is_admin):
         self.email = email
         self.hash_pass = hash_pass
+        self.nickname = nickname
         self.salt = salt
         self.is_admin = is_admin
 
@@ -20,6 +22,7 @@ class Users(db.Model):
         return {
             'id': self.id,
             'email': self.email,
+            'nickname': self.nickname,
             'hash_pass': self.hash_pass,
             'salt': self.salt,
             'is_admin': self.is_admin
@@ -29,5 +32,6 @@ class Users(db.Model):
         return {
             'id': self.id,
             'email': self.email,
+            'nickname': self.nickname,
             'is_admin': self.is_admin
         }