adds create, update methods to service

student-address-service/src/main/java/service/student/studentaddressservice/service/StudentAddressService.java

 package service.student.studentaddressservice.service;
 
+import org.apache.catalina.valves.StuckThreadDetectionValve;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.domain.Example;
 import org.springframework.stereotype.Repository;
 import org.springframework.stereotype.Service;
+import service.student.studentaddressservice.StudentAddressServiceApplication;
 import service.student.studentaddressservice.model.StudentAddress;
 import service.student.studentaddressservice.repository.StudentAddressRepository;
 
@@ -22,4 +24,21 @@ public class StudentAddressService {
     public Optional<StudentAddress> getStudentAddressByEmail(String email){
         return Optional.ofNullable(studentAddressRepository.findByEmail(email));
     }
+
+    public StudentAddress createStudentAddress(StudentAddress studentAddressDetails) {
+        return studentAddressRepository.save(studentAddressDetails);
+    }
+
+    public StudentAddress updateStudentAddress(StudentAddress studentAddressDetails, String email) {
+        StudentAddress studentAddressToUpdate =
+                getStudentAddressByEmail(email).orElseThrow(() -> new NullPointerException("Email not found: " + email));   //TEMPORARY FIX
+        studentAddressToUpdate.setStreetAddress(studentAddressDetails.getStreetAddress());
+        studentAddressToUpdate.setState(studentAddressDetails.getState());
+        studentAddressToUpdate.setCity(studentAddressDetails.getCity());
+        studentAddressToUpdate.setZip(studentAddressDetails.getZip());
+        if (studentAddressDetails.getAptNum() != null) {
+            studentAddressToUpdate.setAptNum(studentAddressDetails.getAptNum());
+        }
+        return studentAddressRepository.save(studentAddressToUpdate);
+    }
 }