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backend/models/api_key_usage.py

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+from sqlalchemy import Column, Integer, String, DateTime, ForeignKey
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from database import Base
+
+
+class APIKeyUsage(Base):
+    __tablename__ = "api_key_usage"
+
+    id = Column(Integer, primary_key=True, index=True)
+    api_key_id = Column(Integer, ForeignKey("api_keys.id"), nullable=False)
+    endpoint = Column(String, nullable=False)
+    method = Column(String, nullable=False)
+    timestamp = Column(DateTime(timezone=True), server_default=func.now())
+    ip_address = Column(String, nullable=True)
+    user_agent = Column(String, nullable=True)
+
+    # Relationships
+    api_key = relationship("APIKey")
+
+    def __repr__(self):
+        return f"<APIKeyUsage(id={self.id}, api_key_id={self.api_key_id}, endpoint='{self.endpoint}')>"