Remove Sts prefix in the request name as it is duplicate with the package

Author: BigTailWolf

google/internal/externalaccount/basecredentials.go

@@ -208,7 +208,7 @@ func (ts tokenSource) Token() (*oauth2.Token, error) {
 	if err != nil {
 		return nil, err
 	}
-	stsRequest := stsexchange.StsTokenExchangeRequest{
+	stsRequest := stsexchange.TokenExchangeRequest{
 		GrantType:          "urn:ietf:params:oauth:grant-type:token-exchange",
 		Audience:           conf.Audience,
 		Scope:              conf.Scopes,

google/internal/stsexchange/sts_exchange.go

@@ -28,7 +28,7 @@ func defaultHeader() http.Header {
 // The first 4 fields are all mandatory.  headers can be used to pass additional
 // headers beyond the bare minimum required by the token exchange.  options can
 // be used to pass additional JSON-structured options to the remote server.
-func ExchangeToken(ctx context.Context, endpoint string, request *StsTokenExchangeRequest, authentication ClientAuthentication, headers http.Header, options map[string]interface{}) (*Response, error) {
+func ExchangeToken(ctx context.Context, endpoint string, request *TokenExchangeRequest, authentication ClientAuthentication, headers http.Header, options map[string]interface{}) (*Response, error) {
 	data := url.Values{}
 	data.Set("audience", request.Audience)
 	data.Set("grant_type", "urn:ietf:params:oauth:grant-type:token-exchange")
@@ -99,8 +99,8 @@ func makeRequest(ctx context.Context, endpoint string, data url.Values, authenti
 	return &stsResp, nil
 }
 
-// StsTokenExchangeRequest contains fields necessary to make an oauth2 token exchange.
-type StsTokenExchangeRequest struct {
+// TokenExchangeRequest contains fields necessary to make an oauth2 token exchange.
+type TokenExchangeRequest struct {
 	ActingParty struct {
 		ActorToken     string
 		ActorTokenType string

google/internal/stsexchange/sts_exchange_test.go

@@ -22,7 +22,7 @@ var auth = ClientAuthentication{
 	ClientSecret: clientSecret,
 }
 
-var exchangeTokenRequest = StsTokenExchangeRequest{
+var exchangeTokenRequest = TokenExchangeRequest{
 	ActingParty: struct {
 		ActorToken     string
 		ActorTokenType string