doctl-databases-*: add page (#10882)

* doctl-databases-*: add page

---------

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>
Co-authored-by: Juri Dispan <juri.dispan@posteo.net>
Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

pages/common/doctl-databases-user.md

@@ -0,0 +1,32 @@
+# doctl databases user
+
+> View details for, and create, database users.
+> More information: <https://docs.digitalocean.com/reference/doctl/reference/databases/user>.
+
+- Run a `doctl databases user` command with an access token:
+
+`doctl databases user {{command}} --access-token {{access_token}}`
+
+- Retrieve details about a database user:
+
+`doctl databases user get {{database_id}} {{user_name}}`
+
+- Retrieve a list of database users for a given database:
+
+`doctl databases user list {{database_id}}`
+
+- Reset the auth password for a given user:
+
+`doctl databases user reset {{database id}} {{user_name}}`
+
+- Reset the MySQL auth plugn for a given user:
+
+`doctl databases user reset {{database_id}} {{user_name}} {{caching_sha2_password|mysql_native_password}}`
+
+- Create a user in the given database with a given username:
+
+`doctl databases user create {{database_id}} {{user_name}}`
+
+- Delete a user from the given database with the given username:
+
+`doctl databases user delete {{database_id}} {{user_name}}`