move oauth connector doc to dex website repo

move default key values configure to connector construct function

Signed-off-by: Rui Yang <ruiya@vmware.com>

README.md

@@ -72,7 +72,7 @@ Dex implements the following connectors:
 | [SAML 2.0](https://dexidp.io/docs/connectors/saml/) | no | yes | no | stable | WARNING: Unmaintained and likely vulnerable to auth bypasses ([#1884](https://github.com/dexidp/dex/discussions/1884)) |
 | [GitLab](https://dexidp.io/docs/connectors/gitlab/) | yes | yes | yes | beta | |
 | [OpenID Connect](https://dexidp.io/docs/connectors/oidc/) | yes | yes | yes | beta | Includes Salesforce, Azure, etc. |
-| [Generic OAuth 2.0](https://dexidp.io/docs/connectors/oauth.md) | no | yes | yes | beta | |
+| [OAuth 2.0](https://dexidp.io/docs/connectors/oauth/) | no | yes | yes | alpha | |
 | [Google](https://dexidp.io/docs/connectors/google/) | yes | yes | yes | alpha | |
 | [LinkedIn](https://dexidp.io/docs/connectors/linkedin/) | yes | no | no | beta | |
 | [Microsoft](https://dexidp.io/docs/connectors/microsoft/) | yes | yes | no | beta | |
@@ -81,7 +81,6 @@ Dex implements the following connectors:
 | [OpenShift](https://dexidp.io/docs/connectors/openshift/) | no | yes | no | alpha | |
 | [Atlassian Crowd](https://dexidp.io/docs/connectors/atlassiancrowd/) | yes | yes | yes * | beta | preferred_username claim must be configured through config |
 | [Gitea](https://dexidp.io/docs/connectors/gitea/) | yes | no | yes | alpha | |
-| [Generic OAuth 2.0](https://dexidp.io/docs/connectors/oauth/) | no | yes | yes | alpha |
 
 Stable, beta, and alpha are defined as:
 

connector/oauth/oauth.go

@@ -65,6 +65,30 @@ type Config struct {
 func (c *Config) Open(id string, logger log.Logger) (connector.Connector, error) {
 	var err error
 
+	if c.UserIDKey == "" {
+		c.UserIDKey = "id"
+	}
+
+	if c.ClaimMapping.UserNameKey == "" {
+		c.ClaimMapping.UserNameKey = "user_name"
+	}
+
+	if c.ClaimMapping.PreferredUsernameKey == "" {
+		c.ClaimMapping.PreferredUsernameKey = "preferred_username"
+	}
+
+	if c.ClaimMapping.GroupsKey == "" {
+		c.ClaimMapping.GroupsKey = "groups"
+	}
+
+	if c.ClaimMapping.EmailKey == "" {
+		c.ClaimMapping.EmailKey = "email"
+	}
+
+	if c.ClaimMapping.EmailVerifiedKey == "" {
+		c.ClaimMapping.EmailVerifiedKey = "email_verified"
+	}
+
 	oauthConn := &oauthConnector{
 		clientID:             c.ClientID,
 		clientSecret:         c.ClientSecret,
@@ -181,36 +205,12 @@ func (c *oauthConnector) HandleCallback(s connector.Scopes, r *http.Request) (id
 		return identity, fmt.Errorf("OAuth Connector: failed to parse userinfo: %v", err)
 	}
 
-	if c.userIDKey == "" {
-		c.userIDKey = "id"
-	}
-
 	userID, found := userInfoResult[c.userIDKey].(string)
 	if !found {
 		return identity, fmt.Errorf("OAuth Connector: not found %v claim", c.userIDKey)
 	}
 
 	identity.UserID = userID
-	if c.userNameKey == "" {
-		c.userNameKey = "user_name"
-	}
-
-	if c.preferredUsernameKey == "" {
-		c.preferredUsernameKey = "preferred_username"
-	}
-
-	if c.groupsKey == "" {
-		c.groupsKey = "groups"
-	}
-
-	if c.emailKey == "" {
-		c.emailKey = "email"
-	}
-
-	if c.emailVerifiedKey == "" {
-		c.emailVerifiedKey = "email_verified"
-	}
-
 	identity.Username, _ = userInfoResult[c.userNameKey].(string)
 	identity.PreferredUsername, _ = userInfoResult[c.preferredUsernameKey].(string)
 	identity.Email, _ = userInfoResult[c.emailKey].(string)