ERR_AUTH                            = 1;
ERR_METHOD                          = 2;
ERR_REQUEST                         = 3;

ERR_JSON                            = 4;
ERR_VERSION                         = 5;


ERR_SCHOOL_NAME_EXISTS              = 100;
ERR_SCHOOL_DELETE                   = 101;
ERR_SCHOOL_UPDATE                   = 102;

ERR_TEACHER_EXISTS                  = 200;
ERR_TEACHER_UNABLE_TO_DELETE        = 201;
ERR_TEACHER_NOT_EXISTS              = 202;
ERR_TEACHER_SCHOOL_NOT_FOUND        = 203;

ERR_CLASS_EXISTS                    = 300;
ERR_CLASS_NOT_EXISTS                = 301;
ERR_CLASS_UPDATE                    = 302;
ERR_CLASS_SCHOOL_NOT_FOUND          = 303;
ERR_CLASS_TEACHER_NOT_FOUND         = 304;

ERR_STUDENT_EXISTS                  = 400;
ERR_STUDENT_NOT_EXISTS              = 401;
ERR_STUDENT_UPDATE                  = 402;
ERR_STUDENT_CLASS_NOT_FOUND         = 403;
