Export call to get user ids (#1069)

## Description

Exposing user IDs in addition to user emails.

## Type of change

<!--- Please check the type of change your PR introduces: --->
- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Test
- [ ] 💻 CI/Deployment
- [X] 🐹 Trivial/Minor

## Issue(s)

<!-- Can reference multiple issues. Use one of the following "magic words" - "closes, fixes" to auto-close the Github issue. -->
* #<issue>

## Test Plan

<!-- How will this be tested prior to merging.-->
- [ ] 💪 Manual
- [X] ⚡ Unit test
- [ ] 💚 E2E

src/pkg/services/m365/m365.go

@@ -19,3 +19,23 @@ func Users(ctx context.Context, m365Account account.Account) ([]string, error) {
 
 	return gc.GetUsers(), nil
 }
+
+// UserIDs returns a list of user IDs for the specified M365 tenant
+// TODO: Implement paging support
+func UserIDs(ctx context.Context, m365Account account.Account) ([]string, error) {
+	gc, err := connector.NewGraphConnector(ctx, m365Account)
+	if err != nil {
+		return nil, errors.Wrap(err, "could not initialize M365 graph connection")
+	}
+
+	return gc.GetUsersIds(), nil
+}
+
+func GetEmailAndUserID(ctx context.Context, m365Account account.Account) (map[string]string, error) {
+	gc, err := connector.NewGraphConnector(ctx, m365Account)
+	if err != nil {
+		return nil, errors.Wrap(err, "could not initialize M365 graph connection")
+	}
+
+	return gc.Users, nil
+}

src/pkg/services/m365/m365_test.go

@@ -1,6 +1,7 @@
 package m365
 
 import (
+	"context"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -41,3 +42,23 @@ func (suite *M365IntegrationSuite) TestUsers() {
 	require.NotNil(suite.T(), users)
 	require.Greater(suite.T(), len(users), 0)
 }
+
+func (suite *M365IntegrationSuite) TestUserIDs() {
+	acct := tester.NewM365Account(suite.T())
+
+	ids, err := UserIDs(context.Background(), acct)
+	require.NoError(suite.T(), err)
+
+	require.NotNil(suite.T(), ids)
+	require.Greater(suite.T(), len(ids), 0)
+}
+
+func (suite *M365IntegrationSuite) TestGetEmailAndUserID() {
+	acct := tester.NewM365Account(suite.T())
+
+	ids, err := GetEmailAndUserID(context.Background(), acct)
+	require.NoError(suite.T(), err)
+
+	require.NotNil(suite.T(), ids)
+	require.Greater(suite.T(), len(ids), 0)
+}