Web API - Power BI keeps asking for credentials, yet does not seem to refresh

[danielmillion]

Hello, 

I have been using API data source for a few months now, but in the last week i am getting an error 

stating power bi cant authenticate the credentials given for the API source which is Anonymous.

My API code : 

let

url = "#######################################",
Content = "{
""DateTimeFromUTC"" : ""2019/01/01 00:00:00"",
""DateTimeToUTC"" : ""2019/03/31 23:59:59""
}
",

Source = Json.Document(Web.Contents(url,[Headers =[#"Content-Type"="application/json", #"AUTH_TOKEN" = "#################"],Content = Text.ToBinary(Content) , Timeout=#duration(0,2,0,0)
]
))

in
Source

Any Suggestions ?