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i think you are looking for this:

My advice would be: don't try this in a playground. Playgrounds aren't ready for this stuff yet. Your code compiles and runs fine in a real project. Here's an example:

First of all, you don't need exactly IntoIterator bound here. It's just enough for Iterator.

The response from the mapbox API is not DirectionsRoute. It is DirectionsResponse, a structure that looks like this:

You are using a &, but want a &mut, rust references are immutable by default: Playground: https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=be82b8ba01dff60e106af9e59df8228e

The default initialiser (the one generated by the compiler, since you didn't declare one explicitly) is actually internal.

This is documented here:

A default initializer has the same access level as the type it initializes, unless that type is defined as public. For a type that’s defined as public, the default initializer is considered internal. If you want a public type to be initializable with a no-argument initializer when used in another module, you must explicitly provide a public no-argument initializer yourself as part of the type’s definition.

So you should do:

I needed to send mails from a gmail account that I have access to, using nodemailer. It works for a couple of days before my refresh token is mysteriously revoked, even though the account belongs to me. A google search brought me here and I had been watching for a while hoping someone would help with a solution.

As you mentioned, this seems to happen with only test/unverified apps and I'm guessing google revokes tokens for such applications in your account after a few days. After much trials and errors, here is what I did.

NOTE: This is solution is only applicable to accounts you own, otherwise you must verify your app to access other people's accounts

1. Generate a new refresh token (existing one is most likely revoked) as described in this SO post
2. Go to the security tab of your google account dashboard
3. Under the Recent security activity section, you should see a security alert for your app.
4. Click on the context menu next to the notification and click DISMISS
5. At this point you'll be presented with a dialog of options where you indicate the level of trust you have for the app. I just went ahead and said I trusted the developer/app, obviously. And that's it! The refresh token should persist after this.

I could not find anything related anywhere else. So, please, accept this answer if it works for you. It might help someone else

From https://www.googleapis.com/drive/v3/files?fields=parents&key=[YOUR_API_KEY], in your situation, when parents is directly put to fields as follows,

such error of Invalid field selection parents occurs. Because the method of "Files: list" returns the file list which is an array including each file metadata. Ref I think that this is the reason of your issue.

So in this case, please set files(parents) instead of parents.

• In the case of files(parents), only parents is returned. When you want to retrieve id, name, mimeType and parents, please use files(id,name,mimeType,parents) to fields.

• Try this API of "Files: list"
• Files