feat: add delete phone endpoint to v2 api (#8321)

# Which Problems Are Solved

- Adds delete phone endpoint to v2 api

# How the Problems Are Solved

- Adds new endpoint with DELETE method to /v2beta/users/:userId/phone
which removes currently set phone number

# Additional Changes

- Added integration test for new endpoint.

# Additional Context

- Solves
https://discord.com/channels/927474939156643850/1255557862286032996

internal/api/grpc/user/v2/phone.go

@@ -40,6 +40,23 @@ func (s *Server) SetPhone(ctx context.Context, req *user.SetPhoneRequest) (resp
 	}, nil
 }
 
+func (s *Server) RemovePhone(ctx context.Context, req *user.RemovePhoneRequest) (resp *user.RemovePhoneResponse, err error) {
+	details, err := s.command.RemoveUserPhone(ctx,
+		req.GetUserId(),
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &user.RemovePhoneResponse{
+		Details: &object.Details{
+			Sequence:      details.Sequence,
+			ChangeDate:    timestamppb.New(details.EventDate),
+			ResourceOwner: details.ResourceOwner,
+		},
+	}, nil
+}
+
 func (s *Server) ResendPhoneCode(ctx context.Context, req *user.ResendPhoneCodeRequest) (resp *user.ResendPhoneCodeResponse, err error) {
 	var phone *domain.Phone
 	switch v := req.GetVerification().(type) {

internal/api/grpc/user/v2/phone_integration_test.go

@@ -3,6 +3,7 @@
 package user_test
 
 import (
+	"context"
 	"fmt"
 	"testing"
 	"time"
@@ -245,3 +246,99 @@ func TestServer_VerifyPhone(t *testing.T) {
 		})
 	}
 }
+
+func TestServer_RemovePhone(t *testing.T) {
+	userResp := Tester.CreateHumanUser(CTX)
+	failResp := Tester.CreateHumanUserNoPhone(CTX)
+	otherUser := Tester.CreateHumanUser(CTX).GetUserId()
+	doubleRemoveUser := Tester.CreateHumanUser(CTX)
+
+	Tester.RegisterUserPasskey(CTX, otherUser)
+	_, sessionTokenOtherUser, _, _ := Tester.CreateVerifiedWebAuthNSession(t, CTX, otherUser)
+
+	tests := []struct {
+		name    string
+		ctx     context.Context
+		req     *user.RemovePhoneRequest
+		want    *user.RemovePhoneResponse
+		wantErr bool
+		dep func(ctx context.Context, userID string) (*user.RemovePhoneResponse, error)
+	}{
+		{
+			name: "remove phone",
+			ctx:  CTX,
+			req: &user.RemovePhoneRequest{
+				UserId: userResp.GetUserId(),
+			},
+			want: &user.RemovePhoneResponse{
+				Details: &object.Details{
+					Sequence:      1,
+					ChangeDate:    timestamppb.Now(),
+					ResourceOwner: Tester.Organisation.ID,
+				},
+			},
+			dep: func(ctx context.Context, userID string) (*user.RemovePhoneResponse, error) {
+				return nil, nil
+			},
+		},
+		{
+			name: "user without phone",
+			ctx:  CTX,
+			req: &user.RemovePhoneRequest{
+				UserId: failResp.GetUserId(),
+			},
+			wantErr: true,
+			dep: func(ctx context.Context, userID string) (*user.RemovePhoneResponse, error) {
+				return nil, nil
+			},
+		},
+		{
+			name: "remove previously deleted phone",
+			ctx:  CTX,
+			req: &user.RemovePhoneRequest{
+				UserId: doubleRemoveUser.GetUserId(),
+			},
+			wantErr: true,
+			dep: func(ctx context.Context, userID string) (*user.RemovePhoneResponse, error) {
+				return Client.RemovePhone(ctx, &user.RemovePhoneRequest{
+					UserId: doubleRemoveUser.GetUserId(),
+				});
+			},
+		},
+		{
+			name:    "no user id",
+			ctx:     CTX,
+			req:     &user.RemovePhoneRequest{},
+			wantErr: true,
+			dep: func(ctx context.Context, userID string) (*user.RemovePhoneResponse, error) {
+				return nil, nil
+			},
+		},
+		{
+			name: "other user, no permission",
+			ctx:  Tester.WithAuthorizationToken(CTX, sessionTokenOtherUser),
+			req: &user.RemovePhoneRequest{
+				UserId: userResp.GetUserId(),
+			},
+			wantErr: true,
+			dep: func(ctx context.Context, userID string) (*user.RemovePhoneResponse, error) {
+				return nil, nil
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			_, depErr := tt.dep(tt.ctx, tt.req.UserId)
+			require.NoError(t, depErr)
+
+			got, err := Client.RemovePhone(tt.ctx, tt.req)
+
+			if tt.wantErr {
+				require.Error(t, err)
+			} else {
+				require.NoError(t, err)
+			}
+			integration.AssertDetails(t, tt.want, got)
+		})
+	}
+}