func FromFile(path string, opts ...Option) (*GServiceAccount, error) {
	buf, err := ioutil.ReadFile(path)
	if err != nil {
		return nil, err
	}

	return FromJSON(buf, opts...)
}
func FromFile(path string, opts ...Option) (*GServiceAccount, error) {
	buf, err := ioutil.ReadFile(path)
	if err != nil {
		return nil, err
	}

	return FromJSON(buf, opts...)
}
func FromFile ( path string , opts ... Option ) ( * GServiceAccount , error ) { buf , err := ioutil . ReadFile ( path ) if err != nil { return nil , err } return FromJSON ( buf , opts ... ) }
// FromFile loads Google service account credentials from a reader.
FromFile loads Google service account credentials from a reader .