feat: sqlalchemy defined orgusers relationship

src/organisation/models.py

@@ -7,6 +7,7 @@ Models:
  - OrgUsers: org_id[fk][cpk], user_id[fk][cpk], is_admin
 """
 from sqlalchemy import Column, Integer, String, ForeignKey, JSON
+from sqlalchemy.orm import relationship
 
 from src.database import Base
 
@@ -25,6 +26,12 @@ class Organisation(Base):
 	security_contact_id = Column(Integer, ForeignKey("contact.id"))
 	owner_contact_id = Column(Integer, ForeignKey("contact.id"))
 
+	users = relationship(
+		"User",
+		secondary="orgusers",
+		back_populates="organisations"
+	)
+
 
 class OrgUsers(Base):
 	__tablename__ = "orgusers"