protected String getOauth2RedirectUrl() {
		return StringUtils.defaultIfBlank(swaggerUiConfig.getOauth2RedirectUrl(), SWAGGER_UI_OAUTH_REDIRECT_URL);
	}
Gets oauth2 redirect url.

@return the oauth2 redirect url
springdoc-openapi-starter-common/src/main/java/org/springdoc/ui/AbstractSwaggerWelcome.java