auth: add token issuer option (#1835)

auth/options.go

@@ -196,6 +196,8 @@ type TokenOptions struct {
 	RefreshToken string
 	// Expiry is the time the token should live for
 	Expiry time.Duration
+	// Issuer of the account
+	Issuer string
 }
 
 type TokenOption func(o *TokenOptions)
@@ -220,6 +222,12 @@ func WithToken(rt string) TokenOption {
 	}
 }
 
+func WithTokenIssuer(iss string) TokenOption {
+	return func(o *TokenOptions) {
+		o.Issuer = iss
+	}
+}
+
 // NewTokenOptions from a slice of options
 func NewTokenOptions(opts ...TokenOption) TokenOptions {
 	var options TokenOptions