feat: implement feature to create a token on behalf of another user in the cli (#14813)

This PR addresses https://github.com/coder/coder/issues/13160

docs/reference/cli/tokens_create.md

@@ -30,3 +30,12 @@ Specify a duration for the lifetime of the token.
 | Environment | <code>$CODER_TOKEN_NAME</code> |
 
 Specify a human-readable name.
+
+### -u, --user
+
+|             |                                |
+| ----------- | ------------------------------ |
+| Type        | <code>string</code>            |
+| Environment | <code>$CODER_TOKEN_USER</code> |
+
+Specify the user to create the token for (Only works if logged in user is admin).