According their docs, you can pass content directly using the spec props:

spec: PropTypes.object

An OpenAPI document respresented as a JavaScript object, JSON string, or YAML string for Swagger UI to display.

Don't use this in conjunction with url - unpredictable behavior may occur.

Example:

<SwaggerUI spec={jsonData} />

To send the Authorization header in "try it out" requests, your API definition file (/v2/swagger-file-url) must define the appropriate security for operations. Users will need to click the "Authorize" button to enter the authentication information (such as the username and password for Basic auth) before doing "try it out".

OpenAPI 3.0 example:

openapi: 3.0.2

components:
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic

security:
  - basicAuth: []

OpenAPI 2.0 example:

swagger: '2.0'

securityDefinitions:
  basicAuth:
    type: basic

security:
  - basicAuth: []

For more information, see:

• Authentication guide for OpenAPI 3.0
• Authentication guide for OpenAPI 2.0