public async Task<bool> Edit(Recovery recovery)
 {
     _db.Entry(recovery).State = EntityState.Modified;
     try
     {
         await Save();
         return true;
     }
     catch
     {
         return false;
     }
 }
 public async Task<bool> Create(Recovery recovery)
 {
     _db.Recoveries.Add(recovery);
     await Save();
     return true;
 }
 public Device GetDevice(Recovery recovery)
 {
     return recovery.Device;
 }