added OAuth2 displayName and pkce options

tools/auth/gitee.go

@@ -24,11 +24,13 @@ type Gitee struct {
 // NewGiteeProvider creates new Gitee provider instance with some defaults.
 func NewGiteeProvider() *Gitee {
 	return &Gitee{&baseProvider{
-		ctx:        context.Background(),
-		scopes:     []string{"user_info", "emails"},
-		authUrl:    "https://gitee.com/oauth/authorize",
-		tokenUrl:   "https://gitee.com/oauth/token",
-		userApiUrl: "https://gitee.com/api/v5/user",
+		ctx:         context.Background(),
+		displayName: "Gitee",
+		pkce:        true,
+		scopes:      []string{"user_info", "emails"},
+		authUrl:     "https://gitee.com/oauth/authorize",
+		tokenUrl:    "https://gitee.com/oauth/token",
+		userApiUrl:  "https://gitee.com/api/v5/user",
 	}}
 }