wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php:201Permissions check for getting all users.
$requestWP_REST_Requesttrue|WP_Error public function get_items_permissions_check( $request ) { // Check if roles is specified in GET request and if user can list users. if ( ! empty( $request['roles'] ) && ! current_user_can( 'list_users' ) ) { return new WP_Error( 'rest_user_cannot_view', __( 'Sorry, you are not allowed to filter users by role.' ), array( 'status' => rest_authorization_required_code() ) ); } // Check if capabilities is specified in GET request and if user can list users. if ( ! empty( $request['capabilities'] ) && ! current_user_can( 'list_users' ) ) { return new WP_Error( 'rest_user_cannot_view', __( 'Sorry, you are not allowed to filter users by capability.' ), array( 'status' => rest_authorization_required_code() ) ); } if ( 'edit' === $request['context'] && ! current_user_can( 'list_users' ) ) { return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to edit users.' ), array( 'status' => rest_authorization_required_code() ) ); } if ( in_array( $request['orderby'], array( 'email', 'registered_date' ), true ) && ! current_user_can( 'list_users' ) ) { return new WP_Error( 'rest_forbidden_orderby', __( 'Sorry, you are not allowed to order users by this parameter.' ), array( 'status' => rest_authorization_required_code() ) ); } if ( 'authors' === $request['who'] ) { $types = get_post_types( array( 'show_in_rest' => true ), 'objects' ); foreach ( $types as $type ) { if ( post_type_supports( $type->name, 'author' ) && current_user_can( $type->cap->edit_posts ) ) { return true; } } return new WP_Error( 'rest_forbidden_who', __( 'Sorry, you are not allowed to query users by this parameter.' ), array( 'status' => rest_authorization_required_code() ) ); } return true; }Introduced in 4.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.