http client is not auto relogin after refresh_token expired.

[nnluc073]

config := oauth2.Config{
	ClientID:     enums.Env.KeycloakClientId,
	ClientSecret: enums.Env.KeycloakClientSecret,
	RedirectURL:  enums.Env.KeycloakRedirect,
	Endpoint: oauth2.Endpoint{
		TokenURL: fmt.Sprintf("%srealms/%s/protocol/openid-connect/token", enums.Env.KeycloakEndpoint, enums.Env.KeycloakRealm),
	},
}

// get a valid token from keycloak
ctx := context.Background()
token, err := config.PasswordCredentialsToken(ctx, enums.Env.KeycloakAdmin, enums.Env.KeycloakPassword)
if err != nil {
	panic(err)
}

// create a new http client that uses the token on every request
client := config.Client(ctx, token)

// create a new keycloak instance and provide the http client
clientKeycloak, err := keycloak.NewKeycloak(client, enums.Env.KeycloakEndpoint)

clientKeycloak can't call api after refresh_token expired.