ServiceAccount.fromJson constructor
Load a service account from a JSON map.
The method may throw an AssertionError if the account contains empty strings.
Implementation
ServiceAccount.fromJson(Map<String, dynamic> json)
: userId = json['userId'] as String,
keyId = json['keyId'] as String,
key = json['key'] as String {
assert(userId != '');
assert(keyId != '');
assert(key != '');
}