add secret manager to docs

docs/secret.md

@@ -0,0 +1,33 @@
+# Supported Secret Managers
+liteLLM reads secrets from yoour secret manager, .env file 
+
+- [Infisical Secret Manager](#infisical-secret-manager)
+- [.env Files](#env-files)
+
+For expected format of secrets see [supported LLM models](./supported.mdsupported)
+
+## Infisical Secret Manager
+Integrates with [Infisical's Secret Manager](https://infisical.com/) for secure storage and retrieval of API keys and sensitive data.
+
+### Usage
+liteLLM manages reading in your LLM API secrets/env variables from Infisical for you
+
+```
+import litellm
+from infisical import InfisicalClient
+
+litellm.secret_manager = InfisicalClient(token="your-token")
+
+messages = [
+    {"role": "system", "content": "You are a helpful assistant."},
+    {"role": "user", "content": "What's the weather like today?"},
+]
+
+response = litellm.completion(model="gpt-3.5-turbo", messages=messages)
+
+print(response)
+```
+
+
+## .env Files
+If no secret manager client is specified, Litellm automatically uses the `.env` file to manage sensitive data.

mkdocs.yml

@@ -7,6 +7,8 @@ nav:
   - 🤖 Supported LLM APIs: 
     - Supported Completion & Chat APIs: supported.md
     - Supported Embedding APIs: supported_embedding.md
+  - 🏃‍♂️ Fetching Inputs: 
+    - Secret Managers: secret.md
   - 💾 Callbacks - Logging Output: 
     - Quick Start: advanced.md
     - Output Integrations: client_integrations.md