Add api endpoints for tweaks and payments

Signed-off-by: Emmy D'Anello <emmy.danello@animath.fr>

participation/api/serializers.py

@@ -61,3 +61,9 @@ class TournamentSerializer(serializers.ModelSerializer):
                   'inscription_limit', 'solution_limit', 'solutions_draw', 'syntheses_first_phase_limit',
                   'solutions_available_second_phase', 'syntheses_second_phase_limit',
                   'description', 'organizers', 'final', 'participations',)
+
+
+class TweakSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Team
+        fields = '__all__'