requested changes pt. 1

plugins/module_utils/user.py

@@ -155,7 +155,7 @@ def user_add(cursor, user, host, host_all, password, encrypted,
              attributes, tls_requires, reuse_existing_password, module):
     # If attributes are set, perform a sanity check to ensure server supports user attributes before creating user
     if attributes and not get_attribute_support(cursor):
-        module.fail_json(msg="user attributes were specified but the mysql server does not support user attributes")
+        module.fail_json(msg="user attributes were specified but the server does not support user attributes")
 
     # we cannot create users without a proper hostname
     if host_all:
@@ -431,15 +431,14 @@ def user_mod(cursor, user, host, host_all, password, encrypted,
 
         if attributes:
             if not attribute_support:
-                module.fail_json(msg="user attributes were specified but the mysql server does not support user attributes")
+                module.fail_json(msg="user attributes were specified but the server does not support user attributes")
             else:
                 current_attributes = attributes_get(cursor, user, host)
                 attributes_to_change = {}
 
                 for key, value in attributes.items():
                     if key not in current_attributes or current_attributes[key] != value:
-                        # The mysql null value (None in python) is used to delete an attribute; we use False to represent None in the attributes parameter
-                        attributes_to_change[key] = None if not value else value
+                        attributes_to_change[key] = value
 
                 if attributes_to_change:
                     msg = "Attributes updated: %s" % (", ".join(["%s: %s" % (key, value) for key, value in attributes_to_change.items()]))
@@ -451,7 +450,7 @@ def user_mod(cursor, user, host, host_all, password, encrypted,
                     else:
                         # Final if statements excludes items whose values are None in attributes_to_change, i.e. attributes that will be deleted
                         final_attributes = {k: v for d in (current_attributes, attributes_to_change) for k, v in d.items() if k not in attributes_to_change or
-                                            attributes_to_change[k]}
+                                            attributes_to_change[k] is not None}
                     changed = True
                 else:
                     final_attributes = current_attributes

plugins/modules/mysql_user.py

@@ -168,7 +168,7 @@ options:
     description:
       - "Create, update, or delete user attributes (arbitrary 'key: value' comments) for the user."
       - MySQL server must support the INFORMATION_SCHEMA.USER_ATTRIBUTES table. Provided since MySQL 8.0.
-      - To delete an existing attribute, set its value to False.
+      - To delete an existing attribute, set its value to null.
     type: dict
     version_added: '3.9.0'
 
@@ -268,7 +268,7 @@ EXAMPLES = r'''
     name: bob
     attributes:
       foo: "foo"
-      bar: False
+      bar: null
 
 - name: Modify user to require TLS connection with a valid client certificate
   community.mysql.mysql_user: