added mistral support

Mistral.py

@@ -0,0 +1,33 @@
+import APIKey
+import requests
+
+
+def check_mistral(key: APIKey):
+    response = requests.get(f'https://api.mistral.ai/v1/models', headers={'Authorization': f'Bearer {key.api_key}'})
+    if response.status_code != 200:
+        return
+    key.subbed = check_sub_status(key)
+    return True
+
+
+def check_sub_status(key: APIKey):
+    data = {
+        'model': 'mistral-tiny',
+        'messages': [{'role': 'user', 'content': ''}],
+        'max_tokens': 0
+    }
+    response = requests.post(f'https://api.mistral.ai/v1/chat/completions', headers={'Authorization': f'Bearer {key.api_key}'}, json=data)
+    if response.status_code == 401 or response.status_code == 429:
+        return False
+    return True
+
+
+def pretty_print_mistral_keys(keys):
+    print('-' * 90)
+    subbed = 0
+    print(f'Validated {len(keys)} Mistral keys:')
+    for key in keys:
+        if key.subbed:
+            subbed += 1
+        print(f'{key.api_key}' + (' | has sub active' if key.subbed else ''))
+    print(f'\n--- Total Valid Mistral Keys: {len(keys)} ({subbed} with an active subscription) ---\n')