perf(oidc): optimize client verification (#6999)

* fix some spelling errors

* client credential auth

* implementation of client auth

* improve error handling

* unit test command package

* unit test database package

* unit test query package

* cleanup unused tracing func

* fix integration tests

* errz to zerrors

* fix linting and import issues

* fix another linting error

* integration test with client secret

* Revert "integration test with client secret"

This reverts commit 0814ba522f.

* add integration tests

* client credentials integration test

* resolve comments

* pin oidc v3.5.0

internal/database/database_test.go

@@ -0,0 +1,92 @@
+package database
+
+import (
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/zitadel/zitadel/internal/database/mock"
+	zerrors "github.com/zitadel/zitadel/internal/errors"
+)
+
+func TestQueryJSONObject(t *testing.T) {
+	type dst struct {
+		A int `json:"a,omitempty"`
+	}
+	const (
+		query = `select $1;`
+		arg   = 1
+	)
+
+	tests := []struct {
+		name    string
+		mock    func(*testing.T) *mock.SQLMock
+		want    *dst
+		wantErr error
+	}{
+		{
+			name: "tx error",
+			mock: func(t *testing.T) *mock.SQLMock {
+				return mock.NewSQLMock(t, mock.ExpectBegin(sql.ErrConnDone))
+			},
+			wantErr: zerrors.ThrowInternal(sql.ErrConnDone, "DATAB-Oath6", "Errors.Internal"),
+		},
+		{
+			name: "no rows",
+			mock: func(t *testing.T) *mock.SQLMock {
+				return mock.NewSQLMock(t,
+					mock.ExpectBegin(nil),
+					mock.ExpectQuery(query,
+						mock.WithQueryArgs(arg),
+						mock.WithQueryResult([]string{"json"}, [][]driver.Value{}),
+					),
+				)
+			},
+			wantErr: sql.ErrNoRows,
+		},
+		{
+			name: "unmarshal error",
+			mock: func(t *testing.T) *mock.SQLMock {
+				return mock.NewSQLMock(t,
+					mock.ExpectBegin(nil),
+					mock.ExpectQuery(query,
+						mock.WithQueryArgs(arg),
+						mock.WithQueryResult([]string{"json"}, [][]driver.Value{{`~~~`}}),
+					),
+					mock.ExpectCommit(nil),
+				)
+			},
+			wantErr: zerrors.ThrowInternal(nil, "DATAB-Vohs6", "Errors.Internal"),
+		},
+		{
+			name: "success",
+			mock: func(t *testing.T) *mock.SQLMock {
+				return mock.NewSQLMock(t,
+					mock.ExpectBegin(nil),
+					mock.ExpectQuery(query,
+						mock.WithQueryArgs(arg),
+						mock.WithQueryResult([]string{"json"}, [][]driver.Value{{`{"a":1}`}}),
+					),
+					mock.ExpectCommit(nil),
+				)
+			},
+			want: &dst{A: 1},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			mock := tt.mock(t)
+			defer mock.Assert(t)
+			db := &DB{
+				DB: mock.DB,
+			}
+			got, err := QueryJSONObject[dst](context.Background(), db, query, arg)
+			require.ErrorIs(t, err, tt.wantErr)
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}