Automatically refresh token

[dobesv]

It would be nice if the client would check the expiry time on the access token and refresh it if it will expire within the next minute.

Or at least offer a method we can call that checks the expiry time and refreshes if the expiration time is within a specified time limit.

Something like:

refreshAccessTokenIfExpiring(secs=60) {
    const expiresAt = this.accessTokenExpiresIn + this.accessTokenUpdatedAt - secs;
    if(Date.now()/1000 >= (this.accessTokenExpiresIn + this.accessTokenUpdatedAt - secs))
      return this.oauth.refreshAccessToken()    
  }
}
// ...
apiRequest(opts) {
    const params = prepareParams(opts, this)
    return this.checkApiLimit(params).then(() => this.refreshAccessTokenIfExpiring()).then(() => ...)
}