Add group to res_partner fields

energy_communities/models/res_partner.py

 import logging
-from odoo.exceptions import ValidationError
 
 from odoo import SUPERUSER_ID, api, fields, models
+from odoo.exceptions import ValidationError
 
 logger = logging.getLogger(__name__)
 
@@ -15,6 +15,15 @@ class ResPartner(models.Model):
             ("not_share", "I prefer to not share it"),
         ]
     )
+    signup_token = fields.Char(
+        groups="base.group_erp_manager,energy_communities.group_admin"
+    )
+    signup_type = fields.Char(
+        groups="base.group_erp_manager,energy_communities.group_admin",
+    )
+    signup_expiration = fields.Datetime(
+        groups="base.group_erp_manager,energy_communities.group_admin"
+    )
 
     @api.model
     def create(self, vals):