this.roleDataSource = new MatTableDataSource(this.availableRoles);
this.applicationsService.getSingleAppInfoById(val).subscribe((res: any) => {
this.appName = res.name;
this.roleDataSource = new MatTableDataSource(this.availableRoles);
this.applicationsService.getSingleAppInfoById(val).subscribe((res: any) => {
this.appName = res.name;