{ "id": "cIhoaw0VJGihOHmy", "meta": { "templateCredsSetupCompleted": true }, "name": "Authentication Panel (Signup/Login/Forgot Password)", "tags": [], "nodes": [ { "id": "e430c384-eec7-4c18-a105-ae8d4d5216bc", "name": "Overview", "type": "n8n-nodes-base.stickyNote", "position": [ 176, 1568 ], "parameters": { "color": 5, "width": 600, "height": 640, "content": "## Overview: Authentication\n**Purpose:** Manages user signup, login, and password reset via a single webhook.\n**Features:**\n- **Signup:** Creates new users with bcrypt-hashed passwords.\n- **Login:** Verifies credentials case-insensitively.\n- **Forgot Password:** Generates and returns a new random password.\n**Prerequisites:**\n- PostgreSQL/Supabase with `users` table.\n- Enable `uuid-ossp` and `pgcrypto` extensions.\n- Set PostgreSQL credentials in n8n.\n**Usage:** POST to `/webhook/auth` with:\n```json\n{ \"path\": \"signup|signin|forgot\", \"email\": \"string\", \"password\": \"string\", \"name\": \"string\" }\n```\n**Example:** `{\"path\": \"signup\", \"email\": \"user@example.com\", \"password\": \"pass123\", \"name\": \"John Doe\"}`\n**Output:** `{\"status\": \"success|error\", \"message\": \"string\", \"data\": {}}`" }, "typeVersion": 1 }, { "id": "a81f1cc2-4d7b-4d71-a103-667f43724c17", "name": "Webhook Doc", "type": "n8n-nodes-base.stickyNote", "position": [ 816, 1568 ], "parameters": { "color": 5, "width": 624, "height": 464, "content": "## Webhook: Entry Point\n**Purpose:** Handles all auth requests via POST.\n**Endpoint:** `/webhook/auth`\n**Input JSON:**\n```json\n{ \"path\": \"signup|signin|forgot\", \"email\": \"string\", \"password\": \"string\", \"name\": \"string\" }\n```\n**Notes:**\n- `path` routes to signup, login, or forgot password.\n- Only POST method supported." }, "typeVersion": 1 }, { "id": "ee0f4193-74e8-4df4-ba1e-09950cc38dfe", "name": "Webhook", "type": "n8n-nodes-base.webhook", "position": [ 1104, 1856 ], "parameters": { "path": "auth", "options": {}, "httpMethod": "POST", "responseMode": "responseNode" }, "typeVersion": 2.1 }, { "id": "1a42c7bc-b3ff-4495-8207-cffe9c2edc70", "name": "Switch Doc", "type": "n8n-nodes-base.stickyNote", "position": [ 1456, 1568 ], "parameters": { "color": 5, "width": 528, "height": 472, "content": "## Switch: Route Actions\n**Purpose:** Routes requests based on `path`.\n**Rules:**\n- `signup` \u2192 Signup\n- `signin` \u2192 Login\n- `forgot` \u2192 Forgot Password\n**Default:** No action for invalid `path`.\n**Notes:** Ensure `path` is lowercase." }, "typeVersion": 1 }, { "id": "e4b6610a-5fcc-4dea-82d7-b8388ba39cdc", "name": "Router", "type": "n8n-nodes-base.switch", "position": [ 1648, 1824 ], "parameters": { "rules": { "rules": [ { "output": 1, "value2": "signup" }, { "output": 2, "value2": "signin" }, { "output": 3, "value2": "forgot" } ] }, "value1": "={{$json[\"path\"]}}", "dataType": "string", "fallbackOutput": 0 }, "typeVersion": 1 }, { "id": "68549d4c-294a-4a74-a849-ee87814334fb", "name": "Signup Doc", "type": "n8n-nodes-base.stickyNote", "position": [ 2000, 1568 ], "parameters": { "color": 6, "width": 580, "height": 472, "content": "## PostgreSQL: Signup\n**Purpose:** Creates a new user.\n**SQL:**\n```sql\nINSERT INTO users (full_name, email, password_hash)\nVALUES ('{{$json[\"name\"]}}', '{{$json[\"email\"]}}', crypt('{{$json[\"password\"]}}', gen_salt('bf')))\nRETURNING id, full_name, email, created_at;\n```\n**Output:** `{ id, full_name, email, created_at }`\n**Notes:**\n- Uses bcrypt for password hashing.\n- Requires unique email in `users` table." }, "typeVersion": 1 }, { "id": "2dd10f62-a7af-4ed3-bbf9-acb3ab00a5c7", "name": "Signup", "type": "n8n-nodes-base.postgres", "position": [ 2352, 1888 ], "parameters": { "query": "INSERT INTO users (full_name, email, password_hash)\nVALUES (\n '{{$json[\"name\"]}}',\n '{{$json[\"email\"]}}',\n crypt('{{$json[\"password\"]}}', gen_salt('bf'))\n)\nRETURNING id, full_name, email, created_at;\n", "options": {}, "operation": "executeQuery" }, "credentials": { "postgres": { "name": "" } }, "typeVersion": 2.6 }, { "id": "2ded10d4-9715-4a06-991a-b5224039f5aa", "name": "Login Doc", "type": "n8n-nodes-base.stickyNote", "position": [ 832, 2096 ], "parameters": { "color": 6, "width": 532, "height": 600, "content": "## PostgreSQL: Login\n**Purpose:** Verifies user credentials.\n**SQL:**\n```sql\nSELECT\n id,\n full_name,\n email,\n (password_hash = crypt('{{$json[\"password\"]}}', password_hash)) AS \"isPasswordMatch\"\nFROM users\nWHERE LOWER(email) = LOWER('{{$json[\"email\"]}}');\n```\n**Output:** `{ id, full_name, email, isPasswordMatch }`\n**Notes:**\n- Case-insensitive email check.\n- `isPasswordMatch` confirms correct password." }, "typeVersion": 1 }, { "id": "7cb04861-2a0b-4298-b050-f6fd232439e1", "name": "Login", "type": "n8n-nodes-base.postgres", "position": [ 864, 2528 ], "parameters": { "query": "SELECT\n id,\n full_name,\n email,\n (password_hash = crypt('{{$json[\"password\"]}}', password_hash)) AS \"isPasswordMatch\"\nFROM users\nWHERE LOWER(email) = LOWER('{{$json[\"email\"]}}');\n", "options": {}, "operation": "executeQuery" }, "credentials": { "postgres": { "name": "" } }, "typeVersion": 2.6 }, { "id": "d189c3bf-9e95-4666-b205-50734ee47821", "name": "IF Doc", "type": "n8n-nodes-base.stickyNote", "position": [ 1392, 2096 ], "parameters": { "color": 6, "width": 400, "height": 600, "content": "## IF: Validate Login\n**Purpose:** Checks if login is valid.\n**Condition:** `id` exists and `isPasswordMatch` is `true`.\n**Outputs:**\n- True \u2192 Success response.\n- False \u2192 Error response (invalid credentials).\n**Notes:** Ensures only valid users proceed." }, "typeVersion": 1 }, { "id": "b154b3cb-d21e-4451-b526-fca72281d0ab", "name": "Check Login", "type": "n8n-nodes-base.if", "position": [ 1504, 2528 ], "parameters": { "options": {}, "conditions": { "options": { "version": 2, "leftValue": "", "caseSensitive": true, "typeValidation": "strict" }, "combinator": "and", "conditions": [ { "id": "41d2a73b-ece5-4043-894a-ab8bf12e55b3", "operator": { "type": "boolean", "operation": "equal" }, "leftValue": "={{ $json[\"id\"] !== undefined && $json[\"isPasswordMatch\"] === true }}", "rightValue": "true" } ] } }, "typeVersion": 2.2 }, { "id": "f7b96eac-f2a1-489c-92e5-10ab62244003", "name": "Forgot Password Doc", "type": "n8n-nodes-base.stickyNote", "position": [ 1808, 2096 ], "parameters": { "color": 6, "width": 580, "height": 608, "content": "## PostgreSQL: Forgot Password\n**Purpose:** Resets password to a random 8-char string.\n**SQL:**\n```sql\nWITH new_pass AS (\n SELECT substring(md5(random()::text) from 1 for 8) AS plain_password\n)\nUPDATE users\nSET password_hash = crypt(new_pass.plain_password, gen_salt('bf'))\nFROM new_pass\nWHERE LOWER(email) = LOWER('{{$json[\"email\"]}}')\nRETURNING email, new_pass.plain_password AS newPassword;\n```\n**Output:** `{ email, newPassword }`\n**Notes:**\n- Case-insensitive email.\n- New password can be emailed." }, "typeVersion": 1 }, { "id": "360ce51c-db91-46ec-841e-518abb068712", "name": "Reset Password", "type": "n8n-nodes-base.postgres", "position": [ 2144, 2416 ], "parameters": { "query": "WITH new_pass AS (\n SELECT substring(md5(random()::text) from 1 for 8) AS plain_password\n)\nUPDATE users\nSET password_hash = crypt(new_pass.plain_password, gen_salt('bf'))\nFROM new_pass\nWHERE LOWER(email) = LOWER('{{$json[\"email\"]}}')\nRETURNING email, new_pass.plain_password AS newPassword;\n", "options": {}, "operation": "executeQuery" }, "credentials": { "postgres": { "name": "" } }, "typeVersion": 2.6 }, { "id": "0a9bf2d6-a7ff-47e4-874f-b6ad0274199c", "name": "Response Doc", "type": "n8n-nodes-base.stickyNote", "position": [ 2432, 2096 ], "parameters": { "color": 5, "width": 688, "height": 600, "content": "## Respond: Send Response\n**Purpose:** Returns JSON response.\n**Format:**\n```json\n{\n \"status\": \"success|error\",\n \"message\": \"string\",\n \"data\": {}\n}\n```\n**Notes:**\n- Success: Returns query results.\n- Error: Handles invalid inputs or failures." }, "typeVersion": 1 }, { "id": "cef94eb3-936a-496a-a950-90c8708ec56a", "name": "Respond", "type": "n8n-nodes-base.respondToWebhook", "position": [ 2848, 2544 ], "parameters": { "options": {} }, "typeVersion": 1.4 }, { "id": "b5d535cc-a1a0-4674-b56f-4f9f2fd6a08d", "name": "Database Setup", "type": "n8n-nodes-base.stickyNote", "position": [ 176, 2240 ], "parameters": { "color": 5, "width": 600, "height": 480, "content": "## Database Setup\n**Purpose:** Configure PostgreSQL/Supabase.\n**Steps:**\n1. Create Supabase project at [supabase.com](https://supabase.com).\n2. Enable extensions: `uuid-ossp`, `pgcrypto`.\n3. Create `users` table:\n```sql\nCREATE TABLE users (\n id uuid PRIMARY KEY DEFAULT uuid_generate_v4(),\n full_name text NOT NULL,\n email text UNIQUE NOT NULL,\n password_hash text NOT NULL,\n created_at timestamptz DEFAULT now()\n);\n```\n4. Add PostgreSQL credentials in n8n.\n**Notes:** Ensure unique email constraint." }, "typeVersion": 1 } ], "active": false, "settings": { "executionOrder": "v1" }, "versionId": "e51c5384-1056-4f65-a0f1-187b68971e0e", "connections": { "Login": { "main": [ [ { "node": "Check Login", "type": "main", "index": 0 } ] ] }, "Router": { "main": [ [], [ { "node": "Signup", "type": "main", "index": 0 } ], [ { "node": "Login", "type": "main", "index": 0 } ], [ { "node": "Reset Password", "type": "main", "index": 0 } ] ] }, "Signup": { "main": [ [ { "node": "Respond", "type": "main", "index": 0 } ] ] }, "Webhook": { "main": [ [ { "node": "Router", "type": "main", "index": 0 } ] ] }, "Check Login": { "main": [ [ { "node": "Respond", "type": "main", "index": 0 } ], [ { "node": "Respond", "type": "main", "index": 0 } ] ] }, "Reset Password": { "main": [ [ { "node": "Respond", "type": "main", "index": 0 } ] ] } } }