fix: allow phone number as basic login

server/auth/basic/auth_basic.go

@@ -23,9 +23,10 @@ const (
 	defaultMinPasswordLength = 3
 )
 
-// Token suitable as a login: starts and ends with a Unicode letter (class L) or number (class N),
-// contains Unicode letters, numbers, dot and underscore.
-var loginPattern = regexp.MustCompile(`^[\pL\pN][_.\pL\pN]*[\pL\pN]+$`)
+// Token suitable as a login: either an E.164 phone number or a name which starts
+// and ends with a Unicode letter (class L) or number (class N), and contains
+// Unicode letters, numbers, dot and underscore.
+var loginPattern = regexp.MustCompile(`^(\+[\pN]+|[\pL\pN][_.\pL\pN]*[\pL\pN]+)$`)
 
 // authenticator is the type to map authentication methods to.
 type authenticator struct {