feat: sqlalchemy defined orgusers relationship

src/user/models.py

@@ -5,6 +5,7 @@ Models:
  - User - id[pk], email, first_name, last_name, oidc_id
 """
 from sqlalchemy import Column, Integer, String
+from sqlalchemy.orm import relationship
 
 from src.database import Base
 
@@ -17,3 +18,9 @@ class User(Base):
 	first_name = Column(String)
 	last_name = Column(String)
 	oidc_id = Column(String, index=True, unique=True)
+
+	organisations = relationship(
+		"Organisation",
+		secondary="orgusers",
+		back_populates="users"
+	)