Merge pull request #5633 from atwixfirster/mutation-changeCustomerPassword-errors

magento/devdocs#: Describe changeCustomerPassword mutation errors

Author: dobooth

guides/v2.3/graphql/mutations/change-customer-password.md

@@ -57,6 +57,16 @@ The `changeCustomerPassword` mutation returns the `customer` object.
 
 {% include graphql/customer-output.md %}
 
+## Errors
+
+Error | Description
+--- | ---
+`The current customer isn't authorized.` | The customer's token does not exist in the `oauth_token` table.
+`Invalid login or password.` | The password specified in the `currentPassword` attribute is not valid.
+`Specify the "currentPassword" value.` | The password specified in the `currentPassword` attribute is empty.
+`Specify the "newPassword" value.` | The password specified in the `newPassword` attribute is empty.
+`The account is locked.` | The customer's password cannot be changed because the account is locked.
+
 ## Related topics
 
 * [customer query]({{page.baseurl}}/graphql/queries/customer.html)