feat: service token introduction

schemas/jwt.py

@@ -3,8 +3,17 @@ from pydantic import BaseModel, Field
 from core.exp import get_exp
 from schemas.providers import ProvidersType
 
+type NumericDate = int | float
 
-class JWTPayload(BaseModel):
+
+class UserJWTPayload(BaseModel):
     sub: str = Field(description="User ID")
     iss: ProvidersType = Field(description="Issuer")
-    exp: float = Field(default_factory=get_exp)
+    exp: NumericDate = Field(default_factory=get_exp)
+
+
+class ServiceJWTPayload(BaseModel):
+    iss: str = Field(description="Service name")
+    iat: NumericDate = Field(description="Issued at")
+    exp: NumericDate = Field(description="Expiration date")
+    acting_as: str = Field(description="Subject of issued call, formatted as `service:id`")