List flow templates

{  "data": [    {      "id": "string",      "name": "string",      "description": "string",      "flow": {        "nodes": [          {            "id": "leadSource-1",            "type": "leadSource",            "position": {              "x": 0,              "y": 0            },            "data": {              "label": "Lead Bucket",              "customFieldKeys": [                "company"              ],              "mappedStandardFieldKeys": [                "email",                "first_name",                "last_name"              ],              "isRequired": true            },            "deletable": false          },          {            "id": "email-1",            "type": "email",            "position": {              "x": 220,              "y": 0            },            "data": {              "label": "Intro Email",              "priority": false,              "variants": [                {                  "id": "11111111-1111-4111-8111-111111111111",                  "label": "A",                  "subject": "Quick question for {{first_name}}",                  "template": "Hi {{first_name}} - reaching out about {{custom.company}}.",                  "isActive": true,                  "order": 0                },                {                  "id": "11111111-1111-4111-8111-111111111112",                  "label": "B",                  "subject": "Following up for {{first_name}}",                  "template": "Hi {{first_name}} - wanted to share a quick idea for {{custom.company}}.",                  "isActive": true,                  "order": 1                }              ]            }          },          {            "id": "waitTime-1",            "type": "waitTime",            "position": {              "x": 460,              "y": 0            },            "data": {              "label": "Wait 1 day",              "duration": "1",              "unit": "days",              "wait_duration_seconds": 86400            }          },          {            "id": "email-2",            "type": "email",            "position": {              "x": 700,              "y": 0            },            "data": {              "label": "Follow-up",              "priority": false,              "variants": [                {                  "id": "22222222-2222-4222-8222-222222222221",                  "label": "A",                  "subject": "Bumping this for {{first_name}}",                  "template": "Hi {{first_name}} - circling back in case this is relevant for {{custom.company}}.",                  "isActive": true,                  "order": 0                },                {                  "id": "22222222-2222-4222-8222-222222222222",                  "label": "B",                  "subject": "Any thoughts, {{first_name}}?",                  "template": "Hi {{first_name}} - should I close the loop or send more detail?",                  "isActive": true,                  "order": 1                }              ]            }          }        ],        "edges": [          {            "id": "e1",            "source": "leadSource-1",            "target": "email-1"          },          {            "id": "e2",            "source": "email-1",            "target": "waitTime-1"          },          {            "id": "e3",            "source": "waitTime-1",            "target": "email-2"          }        ]      }    }  ]}

{  "error": {    "type": "authentication_error",    "code": "invalid_api_key",    "message": "A valid Furnace API key is required"  }}

{  "error": {    "type": "rate_limit_error",    "code": "rate_limit_exceeded",    "message": "Rate limit exceeded for this account"  }}

{  "error": {    "type": "api_error",    "code": "internal_error",    "message": "Internal server error"  }}