First commit

errors.go

@@ -0,0 +1,21 @@
+package namecheck
+
+import "fmt"
+
+type ErrSocialNetwork interface {
+	Error() error
+	Unwrap() error
+}
+
+type ErrUnknownAvailability struct {
+	Username string
+	Cause    error
+}
+
+func (e *ErrUnknownAvailability) Error() string {
+	return fmt.Sprintf("Error during check for username '%s'\n[%s]\n", e.Username, e.Cause)
+}
+
+func (e *ErrUnknownAvailability) Unwrap() error {
+	return e.Cause
+}