Implement password change API endpoint

packages/sshecret-admin/src/sshecret_admin/services/models.py

@@ -257,3 +257,18 @@ class AuditQueryFilter(AuditFilter):
 
     offset: int = 0
     limit: int = 100
+
+
+class UserPasswordChange(BaseModel):
+    """Model for changing the password of a user."""
+
+    current_password: str
+    new_password: str
+    new_password_confirm: str
+
+    @model_validator(mode="after")
+    def validate_passwords(self) -> Self:
+        """Validate that the passwords match."""
+        if self.new_password != self.new_password_confirm:
+            raise ValueError("Passwords don't match")
+        return self