[Spring] Bug incorrect response entity object when generating oneOf

Description

Incorrect response entity object when generating oneOf.
Codegen generated an model interface, called OneOfinlineResponse200.
3 other classes extended OneOfinlineResponse200,
including InlineResponse200, Token, Error

However, Codegen generated an api interface, called AuthenticationApi
Inside this class, there is a function , ResponseEntity<InlineResponse200>login

When implementing AuthenticationApi interface, I can only response InlineResponse200, but not Token or Error...

Swagger-codegen version

3.0.23

Swagger declaration file content or url

paths:
  /authentication:
    post:
      summary: Authenticate an user
      operationId: login
      requestBody:
        description: Authenticate an user
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/User'
        required: true
      responses:
        200:
          description: 'AAB'
          content:
            application/json:
              schema:
                oneOf:
                  - $ref: '#/components/schemas/Error'
                  - $ref: '#/components/schemas/Token'
components:
  schemas:
    Error:
      type: object
      required:
        - message
        - code
      properties:
        message:
          type: string
        code:
          type: string
    User:
      type: object
      properties:
        userName:
          type: string
        userPassword:
          type: string
          format: password
    Token:
      type: object
      properties:
        token:
          type: string

Command line used for generation

<plugin>
    <groupId>io.swagger.codegen.v3</groupId>
    <artifactId>swagger-codegen-maven-plugin</artifactId>
    <version>3.0.23</version>
    <executions>
        <execution>
            <goals>
                <goal>generate</goal>
            </goals>
            <configuration>
                <inputSpec>
                   xxxxxx/openapi.yml
                </inputSpec>
                <language>spring</language>
                <apiPackage>xxxx</apiPackage>
                <modelPackage>xxxxx</modelPackage>
                <supportingFilesToGenerate>
                    ApiUtil.java
                </supportingFilesToGenerate>
                <configOptions>
                    <sourceFolder>src/main/java/</sourceFolder>
                    <delegatePattern>true</delegatePattern>
                    <interfaceOnly>true</interfaceOnly>
                    <java8>true</java8>
                </configOptions>
            </configuration>
        </execution>
    </executions>
</plugin>

Steps to reproduce

mvn clean compile

Related issues/PRs

Not found

Suggest a fix/enhancement

Should the function change from ResponseEntity<InlineResponse200> to ResponseEntity<OneOfinlineResponse200>

Or

InlineReponses200 class should have Token and User two variable?

Or

Just I don't know how to implement?

Start with the Spring generation invoked by the swagger-codegen Maven plugin and reproduce the issue using the supplied OpenAPI schema and configuration. Inspect the generated AuthenticationApi, InlineResponse200, and OneOfinlineResponse200 types; done means the generated response type can represent the Error and Token alternatives and the generated project compiles with mvn clean compile.