public bool RemoveParentFromStudent(RelationshipRequestDTO request)
 {
     try
     {
         return(_StudentsRepo.RemoveParentFromStudent(request.StudentId, request.ParentId));
     }
     catch (Exception e)
     {
         return(false);
     }
 }
 public bool RemoveTeacherFromGroup(RelationshipRequestDTO request)
 {
     try
     {
         return(_TeachersRepo.RemoveTeacherFromGroup(request.TeacherId, request.GroupId));
     }
     catch (Exception e)
     {
         return(false);
     }
 }
 public bool AddStudentToGroup(RelationshipRequestDTO request)
 {
     try
     {
         return(_StudentsRepo.AddStudentToGroup(request.StudentId, request.GroupId));
     }
     catch (Exception e)
     {
         return(false);
     }
 }
 public bool addExistingParent(RelationshipRequestDTO request)
 {
     try
     {
         return(_StudentsRepo.AddParentToStudent(request.StudentId, request.ParentId));
     }
     catch (Exception e)
     {
         return(false);
     }
 }
 public bool AddTeacherToGroup(RelationshipRequestDTO request)
 {
     try
     {
         return(_TeachersRepo.AddTeacherToGroup(request.TeacherId, request.GroupId));
     }
     catch (Exception e)
     {
         return(false);
     }
 }