in uber-core/src/main/java/com/uber/sdk/core/client/internal/LoginPushedAuthorizationRequest.java [89:95]
static OAuth2Service createOAuthService(String baseUrl) {
return new Retrofit.Builder()
.baseUrl(baseUrl)
.addConverterFactory(MoshiConverterFactory.create())
.build()
.create(OAuth2Service.class);
}