feat:

--Added Read Registered nodes API
	--Added DEL unregister Node

models.py

@@ -1,17 +1,27 @@
 from sqlalchemy import Column, BigInteger, Integer, String
 from database import Base
-
+import uuid
+from sqlalchemy.dialects.postgresql import UUID
 
 class NodeInterface(Base):
     __tablename__ = "fastAPI_node_interface"
 
+    uuid = Column(
+        UUID(as_uuid=True),
+        primary_key=True,
+        default=uuid.uuid4,
+        nullable=False
+    )
+
     if_id = Column(
         BigInteger,
-        primary_key=True
+        unique=True,
+        nullable=False
     )
 
     if_name = Column(
         String,
+        unique=True,
         nullable=False
     )
 
@@ -22,6 +32,7 @@ class NodeInterface(Base):
 
     host = Column(
         String,
+        unique=True,
         nullable=False
     )