iOS apps that worked 30 minutes ago are no longer working. The problem seems to be retrieving the access token. My Photons are still online and working, and I can call functions from the CLI, but not from my apps. If I call a function from my app, I get an "Invalid_token" error message. Also, I can't list my access tokens, even though I know I have at least one which I can see in Build. This is the code I use to list them,
func listAccessTokens() {
let url = NSURL(string: "https://api.particle.io/v1/access_tokens")
let request = NSMutableURLRequest(URL: url!, cachePolicy: .ReloadIgnoringCacheData, timeoutInterval: 10)
request.HTTPMethod = "GET"
let userAndPassword = userName + ":" + password
print("\(userName) \(password)")
let plainData = userAndPassword.dataUsingEncoding(NSUTF8StringEncoding)
let base64String = plainData!.base64EncodedStringWithOptions(.Encoding64CharacterLineLength)
request.setValue("Basic " + base64String, forHTTPHeaderField: "Authorization")
session = NSURLSession.sharedSession()
let dataTask = session.dataTaskWithRequest(request) { (data, response, taskError) -> Void in
if (taskError == nil) {
do {
if let tokenArray = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.AllowFragments) as? NSArray {
print(tokenArray)
}else{
print("tokenArray was nil")
}
} catch let jsonError as NSError {
print(jsonError.localizedDescription)
}
}else{
print("taskError from executeFunction func is: \(taskError!.localizedDescription)")
}
}
dataTask.resume()
}
The result of calling this function is "tokenArray was nil". This code worked fine last night, and for many months before; it hasn't been changed recently. If I put in a statement to print out the data (after converting it to a string) before doing the JSON deserialization, then I get this output:
data string is: {
"ok": false,
"errors": [
{}
]
}
After Edit: I also tried to retrieve my access tokens using the CLI, using "particle token list" (btw, is this documented anywhere? I got it from the forum). The results of that look similar to what I get with my app,
RDM-iMac:~ ricdelmar$ particle token list
Checking with the cloud...
? Using account rdelmar@comcast.net
Please enter your password: *************
error listing tokens: [object Object]
Error listing access tokens [ {} ]
Please make sure you're online and logged in.
[ {} ]
feature to allow individual keyboard layouts per application and since you won’t see your acutal password on screen, you might type the wrong letters (happens to me regularly with English vs. German 
)