user = env["res.users"].search([("login", "=", "demo.student")], limit=1)
if user:
    student = env["education.student"].search([], limit=1)
    if student:
        student.write({"portal_user_id": user.id})
        env.cr.commit()
        print("LINKED STUDENT ID:", student.id, "TO USER ID:", user.id)
    else:
        print("NO STUDENT FOUND")
else:
    print("NO USER FOUND")

print("USER:", user.id)
print("USER STUDENT:", user.student_id.id)
print("STUDENT NAME:", user.student_id.full_name)