An Error occurred while i trying to create users using .net API

Hello,

An error occurred while I was attempting to create users, as shown below.

500 Internal Server Error (Error while inserting into table 'DWUser'.
Exception : String or binary data would be truncated.
The statement has been terminated.)

Code :- 

 public static User CreateUser(Organization org, DocuwareUsersViewModel lvm)
        {
                NewUser createUser = new NewUser();
                createUser.DbName = lvm.USERNAME;
                createUser.Name = lvm.USERNAME;
                createUser.Email =lvm.EMAIL;
                createUser.NetworkId = "";
                createUser.Password = lvm.PASSWORD;

                return org.PostToUserInfoRelationForUser(createUser);
        }

Thank you.

Thanuja