fix: rename OTP to TOTP in v2 alpha user api

This change renames the v2 user OTP registration endpoints and objects
to TOTP.
Also the v2 related code paths have been renamed to TOTP.

This change was discussed during the sprint review.

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

@@ -0,0 +1,155 @@
+//go:build integration
+
+package user_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/zitadel/zitadel/internal/integration"
+	user "github.com/zitadel/zitadel/pkg/grpc/user/v2alpha"
+)
+
+func TestServer_RegisterTOTP(t *testing.T) {
+	// userID := Tester.CreateHumanUser(CTX).GetUserId()
+
+	type args struct {
+		ctx context.Context
+		req *user.RegisterTOTPRequest
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    *user.RegisterTOTPResponse
+		wantErr bool
+	}{
+		{
+			name: "missing user id",
+			args: args{
+				ctx: CTX,
+				req: &user.RegisterTOTPRequest{},
+			},
+			wantErr: true,
+		},
+		{
+			name: "user mismatch",
+			args: args{
+				ctx: CTX,
+				req: &user.RegisterTOTPRequest{
+					UserId: "wrong",
+				},
+			},
+			wantErr: true,
+		},
+		/* TODO: after we are able to obtain a Bearer token for a human user
+		https://github.com/zitadel/zitadel/issues/6022
+		{
+			name: "human user",
+			args: args{
+				ctx: CTX,
+				req: &user.RegisterTOTPRequest{
+					UserId: userID,
+				},
+			},
+			want: &user.RegisterTOTPResponse{
+				Details: &object.Details{
+					ResourceOwner: Tester.Organisation.ID,
+				},
+			},
+		},
+		*/
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := Client.RegisterTOTP(tt.args.ctx, tt.args.req)
+			if tt.wantErr {
+				require.Error(t, err)
+				return
+			}
+			require.NoError(t, err)
+			require.NotNil(t, got)
+			integration.AssertDetails(t, tt.want, got)
+			assert.NotEmpty(t, got.GetUri())
+			assert.NotEmpty(t, got.GetSecret())
+		})
+	}
+}
+
+func TestServer_VerifyTOTPRegistration(t *testing.T) {
+	userID := Tester.CreateHumanUser(CTX).GetUserId()
+
+	/* TODO: after we are able to obtain a Bearer token for a human user
+	reg, err := Client.RegisterTOTP(CTX, &user.RegisterTOTPRequest{
+		UserId: userID,
+	})
+	require.NoError(t, err)
+	code, err := totp.GenerateCode(reg.Secret, time.Now())
+	require.NoError(t, err)
+	*/
+
+	type args struct {
+		ctx context.Context
+		req *user.VerifyTOTPRegistrationRequest
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    *user.VerifyTOTPRegistrationResponse
+		wantErr bool
+	}{
+		{
+			name: "user mismatch",
+			args: args{
+				ctx: CTX,
+				req: &user.VerifyTOTPRegistrationRequest{
+					UserId: "wrong",
+				},
+			},
+			wantErr: true,
+		},
+		{
+			name: "wrong code",
+			args: args{
+				ctx: CTX,
+				req: &user.VerifyTOTPRegistrationRequest{
+					UserId: userID,
+					Code:   "123",
+				},
+			},
+			wantErr: true,
+		},
+		/* TODO: after we are able to obtain a Bearer token for a human user
+		https://github.com/zitadel/zitadel/issues/6022
+		{
+			name: "success",
+			args: args{
+				ctx: CTX,
+				req: &user.VerifyTOTPRegistrationRequest{
+					UserId: userID,
+					Code:   code,
+				},
+			},
+			want: &user.VerifyTOTPRegistrationResponse{
+				Details: &object.Details{
+					ResourceOwner: Tester.Organisation.ResourceOwner,
+				},
+			},
+		},
+		*/
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := Client.VerifyTOTPRegistration(tt.args.ctx, tt.args.req)
+			if tt.wantErr {
+				require.Error(t, err)
+				return
+			}
+			require.NoError(t, err)
+			require.NotNil(t, got)
+			integration.AssertDetails(t, tt.want, got)
+		})
+	}
+}