// Check Userlogin if it contains adminuser1 as username, if not, add adminuser1 with password xyz.

UserLogin login = new UserLogin();
login.username="adminuser1";
login.password="xyz";
context.UserLogins.Add(login);
context.SaveChanges();

// query again from database to get the userid
Userlogin user = context.UserLogins.Single(l=>(l.username=="adminuser1")&& (l.password=="xyz"));
int userid = user.userid;
UserRole admin = new UserRole();
admin.userid = userid;
admin.role="admin";
context.UserRoles.Add(admin);
context.SaveChanges();

UserLogin login = new UserLogin();
login.username="adminuser1";
login.password="xyz";
UserLogin user = context.UserLogins.Add(login);
UserRole admin = new UserRole();
admin.userid = user.userid;
admin.role="admin";
context.UserRoles.Add(admin);
context.SaveChanges();