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How to parse FirebaseAuthException exception message (Admin SDK Java)?

I'm using Firebase Admin SDK Java API v6.12.2.
I call FirebaseAuth.getInstance().generatePasswordResetLink(email, actionCodeSettings) to generate a password reset link for users. If the email isn't registered, I get a big blob of text with embedded JSON from e.getMessage().
The looked at the FirebaseAuthException doc and it only exposes one method e.getErrorCode(), which in this case returns internal-error.
I can certainly parse this text to look for "EMAIL_NOT_FOUND" and translate it into a user-friendly message. But isn't that a very clumsy error message? At least, there should have been methods to return the error code 400, and a simple String message, and the details could go into a JSON object.
What is the recommended approach here by the Firebase team and how are other developers handling it?
Output of e.getMessage():
Unexpected HTTP response with status: 400; body: {
"error": {
"code": 400,
"message": "EMAIL_NOT_FOUND",
"errors": [
{
"message": "EMAIL_NOT_FOUND",
"domain": "global",
"reason": "invalid"
}
]
}
}

Google Cloud Dataflow input collections number of elements added is not consistent with number of elements inserted into BigQuery?

I currently have a Google Cloud Dataflow job that consumes messages from a Google Cloud PubSub subscription and writes the results to BigQuery using Load Jobs every 2 minutes. However, I seem to be actually writing less rows to BigQuery than the number of elements added displayed in the Google Cloud Dataflow UI for the WriteToBigQuery step:
The amount of rows written to BigQuery were only around 200,000. After looking through the StackDriver logs, there were a few Info level logs stating that the job failed and a retry was taking place, but there were no indication of why the job was failing. There were no explicit errors that occurred, apart from one with the following message:
"Request failed with code 409, performed 0 retries due to IOExceptions, performed 0 retries due to unsuccessful status codes, HTTP framework says request can be retried, (caller responsible for retrying)"
The HTTP resource included with the message was:
{ "error": {
"code": 401,
"message": "Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.",
"errors": [
{
"message": "Login Required.",
"domain": "global",
"reason": "required",
"location": "Authorization",
"locationType": "header"
}
],
"status": "UNAUTHENTICATED"}}
The error was also followed by another Info level log with the following message (along with the 409 Exception code again):
BigQuery job {jobId=insert_job_id, location=US, project=project_id} already exists, will not retry inserting it:
There should not be any authentication errors as otherwise none of the rows would be written to BigQuery so I am rather confused here. Is there any other way to diagnose the problem?

using google api explorer to upload data to google cloud storage

i am trying to use google api explorer to first try to insert an object to google cloud storage.
the request looks like
POST https://www.googleapis.com/storage/v1/b/visionapibucket/o?key={YOUR_API_KEY}
{
"contentType": "image/jpeg",
"uploadType": "media",
"path": "/upload/storage/v1/b/visionapibucket/o"
}
but i see the error as
400 HTTP/2.0 400
- Show headers -
{
"error": {
"errors": [
{
"domain": "global",
"reason": "required",
"message": "Required"
},
{
"domain": "global",
"reason": "wrongUrlForUpload",
"message": "Upload requests must include an uploadType URL parameter and a URL path beginning with /upload/",
"extendedHelp": "https://cloud.google.com/storage/docs/json_api/v1/how-tos/upload"
}
],
"code": 400,
"message": "Required"
}
}
not sure what i am missing. please advise

Looks like a bug on the website. It doesn't seem like the explorer supports media.
The request it generated looks like:
POST https://www.googleapis.com/storage/v1/b/visionapibucket/o?key={YOUR_API_KEY}
But a proper upload request would look like:
POST https://www.googleapis.com/upload/storage/v1/b/visionapibucket/o?key={YOUR_API_KEY}&uploadType=media&name=myfile.jpeg
You'll also want to include a "Content-Type" header specifying that it's a JPEG image.
There's a guide on the various ways to upload objects using the JSON API here. The specific type you're looking for is like a simple upload.

Google Drive SDK Update sharing permissions to private

I like to update the permission of a document from anyone with the link to private, to set the permission to (anyone with the link) use this and works:
newPermission.setType("anyone");
newPermission.setWithLink(true);
newPermission.setRole("reader");
but trying to set the permission to private is not working, i'm using this :
newPermission.setType("user");
newPermission.setValue("me");
newPermission.setRole("owner");
the response is this
500 Internal Server Error
- Show headers -
{
"error": {
"errors": [
{
"domain": "global",
"reason": "internalError",
"message": "Internal Error"
}
],
"code": 500,
"message": "Internal Error"
}
}
What are the parameters that i have to pass to set the permissions to private ??

Are you the owner of the document? If not, you can not set yourself as owner. If you are, then the list of permissions for the document will have two entries, one for you as owner and another one to make everyone else a reader. Find the latter and delete it, and you should be all set.

OAuth2 and Drive API, can't list/retrieve files

I have a web application that needs to list all files from my Google Drive and then fetch them when clicked.
I use OAuth for authenticating and it seems to work (the same code works well with Calendar API). I tried different scopes in serviceAccountScopes with no avail.
Basically authentication is:
credential = new GoogleCredential.Builder().
setTransport(HTTP_TRANSPORT).
setJsonFactory(JSON_FACTORY).
setServiceAccountId(apiEmail).
setServiceAccountScopes(DriveScopes.DRIVE).
setServiceAccountPrivateKeyFromP12File(p12File).build();
credential.refreshToken();
service = new Drive.Builder(HTTP_TRANSPORT, JSON_FACTORY, credential).
setApplicationName("My API").build();
edit: I should Add that credential's accessToken is null before refreshToken() call.
After that I try:
FileList files = service.files().list().execute();
The returned FileList is (should contain items):
{"etag":"\"_U9FTLXcHskmKgrWAZqJlfW8kCo/vyGp6PvFo4RvsFtPoIWeCReyIC8\"","items":[],"kind":"drive#fileList","selfLink":"https://www.googleapis.com/drive/v2/files"}
If I check that selfLink the contents is:
{
"error": {
"errors": [
{
"domain": "usageLimits",
"reason": "dailyLimitExceededUnreg",
"message": "Daily Limit for Unauthenticated Use Exceeded. Continued use requires signup.",
"extendedHelp": "https://code.google.com/apis/console"
}
],
"code": 403,
"message": "Daily Limit for Unauthenticated Use Exceeded. Continued use requires signup."
}
}
Daily limit is not an issue here. (I guess this has nothing to do with this issue, since: https://stackoverflow.com/a/10639679/2090125). Also, I have enabled Drive and Drive SDK in Console (https://stackoverflow.com/a/10329353/2090125).
When downloading a file this is performed:
File file = service.files().get(fileId).execute();
And it produces this (fileId exists):
An error occured: com.google.api.client.googleapis.json.GoogleJsonResponseException: 404 Not Found
{
"code" : 404,
"errors" : [ {
"domain" : "global",
"message" : "File not found: 0B97KF40kTwrTaTllMnZCTV9ZSnM",
"reason" : "notFound"
} ],
"message" : "File not found: 0B97KF40kTwrTaTllMnZCTV9ZSnM"
}
And again when checking https://www.googleapis.com/drive/v2/files/0B97KF40kTwrTaTllMnZCTV9ZSnM the same "dailyLimitExceededUnreg" is seen.
What is going on here, is there a problem in my authentication? Should I configure Drive Integration in Drive SDK somehow? From Googles documentation I have understood that it's not necessary and the methods I'm using should work without further configuring.