session revoking, perm, DatabaseError (partially)

src/users/permissions.rs

@@ -1,13 +1,15 @@
-use crate::users::User;
+use crate::{database::DatabaseError, users::User};
 
 /// Infradmin and systemuser have all permissions.
 pub enum Permission {
     // All Users have the right to observe their own sessions
     ListOthersSessions,
+    // All Users have the right to revoke their own sessions
+    RevokeOthersSessions,
 }
 
 impl User {
-    pub fn has_permission(&self, permission: Permission) -> Result<bool, rusqlite::Error> {
+    pub fn has_permission(&self, permission: Permission) -> Result<bool, DatabaseError> {
         if self.is_infradmin() || self.is_systemuser() {
             return Ok(true);
         }