Improve support for Azure AD OAuth 2.0 (#634)

- rename scopes param to scope

Author: EronWright

pulsar/internal/auth/oauth2.go

@@ -36,7 +36,7 @@ const (
 	ConfigParamTypeClientCredentials = "client_credentials"
 	ConfigParamIssuerURL             = "issuerUrl"
 	ConfigParamAudience              = "audience"
-	ConfigParamScopes                = "scopes"
+	ConfigParamScope                 = "scope"
 	ConfigParamKeyFile               = "privateKey"
 	ConfigParamClientID              = "clientId"
 )
@@ -64,7 +64,7 @@ func NewAuthenticationOAuth2WithParams(params map[string]string) (Provider, erro
 	case ConfigParamTypeClientCredentials:
 		flow, err := oauth2.NewDefaultClientCredentialsFlow(oauth2.ClientCredentialsFlowOptions{
 			KeyFile:          params[ConfigParamKeyFile],
-			AdditionalScopes: strings.Split(params[ConfigParamScopes], " "),
+			AdditionalScopes: strings.Split(params[ConfigParamScope], " "),
 		})
 		if err != nil {
 			return nil, err

pulsar/internal/auth/oauth2_test.go

@@ -98,15 +98,15 @@ func TestNewAuthenticationOAuth2WithParams(t *testing.T) {
 			ConfigParamClientID:  "client-id",
 			ConfigParamAudience:  "audience",
 			ConfigParamKeyFile:   kf,
-			ConfigParamScopes:    "profile",
+			ConfigParamScope:     "profile",
 		},
 		{
 			ConfigParamType:      ConfigParamTypeClientCredentials,
 			ConfigParamIssuerURL: server.URL,
 			ConfigParamClientID:  "client-id",
 			ConfigParamAudience:  "audience",
 			ConfigParamKeyFile:   fmt.Sprintf("file://%s", kf),
-			ConfigParamScopes:    "profile",
+			ConfigParamScope:     "profile",
 		},
 		{
 			ConfigParamType:      ConfigParamTypeClientCredentials,
@@ -120,7 +120,7 @@ func TestNewAuthenticationOAuth2WithParams(t *testing.T) {
   "client_email":"oauth@test.org",
   "issuer_url":"%s"
 }`, server.URL),
-			ConfigParamScopes: "profile",
+			ConfigParamScope: "profile",
 		},
 	}