private async Task <AspNetRole> SetDefaultRole(IContextProvider cp, string usrId)
{
var role = cp
.GetTable <AspNetRole>()
.FirstOrDefault(t => t.RoleName == "user");
if (role == null)
{
throw new InvalidOperationException();
}
var userRole =
new AspNetUserRole()
{
AspNetUserId = usrId,
RoleId = role.Id,
};
await cp.InsertNonEntityAsync(userRole);
return(role);
}