How to add custom Sign up field that refers another entity

export const getEmailUserFields = defineUserSignupFields({
  username: (data: any) => data.email,
  isAdmin: (data: any) => adminEmails.includes(data.email),
  email: (data: any) => data.email,
  firstName: (data: any) => data.firstName,
  lastName: (data: any) => data.lastName,
  academicYearLevel: (data: any) => data.academicYearLevel,
  university: (data: any) => ({
    connect: { id: data.universityId } // Assuming `universityId` is the ID of the selected university
  }),
  college: (data: any) => ({
    connect: { id: data.collegeId } // Assuming `collegeId` is the ID of the selected college
  }),
});