[IMP] do not return partner if company register number is None or empty

easy_my_coop/models/partner.py

@@ -211,9 +211,14 @@ class ResPartner(models.Model):
         )
 
     def get_cooperator_from_crn(self, company_register_number):
-        return self.env["res.partner"].search(
+        company_register_number = company_register_number.strip()
+        if company_register_number:
+            partner = self.env["res.partner"].search(
                 [
                     ("cooperator", "=", True),
                     ("company_register_number", "=", company_register_number),
                 ]
             )
+        else:
+            partner = None
+        return partner