[BUG][JAVA] JSON Parse Error in Deserializing Model Response

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

I am using OpenAPI Generate to create an SDK using OpenAPI Spec. After generating my code I get methods like usersGet and models like GetUsersResponse. When I call this method in my application code I call this generated code method like below:

    ApiClient apiClient = new ApiClient();

    apiClient.setDebugging(true);
    ...
    UsersApi usersApi = new UsersApi(apiClient);
    
    System.out.println(usersApi.usersGet());

Since I am not passing in a restTemplate I am using the generated resttemplate in my ApiClient that looks like this (this is part of the generated code):

    /**
     * Build the RestTemplate used to make HTTP requests.
     * @return RestTemplate
     */
    protected RestTemplate buildRestTemplate() {
        RestTemplate restTemplate = new RestTemplate();
        // This allows us to read the response more than once - Necessary for debugging.
        restTemplate.setRequestFactory(new BufferingClientHttpRequestFactory(restTemplate.getRequestFactory()));

        // disable default URL encoding
        DefaultUriBuilderFactory uriBuilderFactory = new DefaultUriBuilderFactory();
        uriBuilderFactory.setEncodingMode(DefaultUriBuilderFactory.EncodingMode.VALUES_ONLY);
        restTemplate.setUriTemplateHandler(uriBuilderFactory);
        return restTemplate;
    }

The Issue
When I call this method I do get a response in my logs but then it eventually crashes, this is the response I get back at first:

{"@timestamp":"2023-03-27T16:53:34.072-05:00","@version":"1","message":"Response Body: [{\"id\":\"2323-9515-4f51-e184-3034fc028297\",\"firstName\":\"Joe\",\"lastName\":\"Sam\",\"role\":\"ADMIN\",\"email\":\"Joe.Sam@company.com\",\"enabled\":true}, {\"id\":\"232-9515-4f51-e184-2323\",\"firstName\":\"Suzy\",\"lastName\":\"Joe\",\"role\":\"ADMIN\",\"email\":\"Suzy.Joe@company.com\",\"enabled\":true}]

Then I get this issue (Error while extracting response for type [class ...] and content type [application/json;charset=utf-8]; nested exception is org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize value of type com.custody.sdk.fireblocks.model.GetUsersResponse from Array value (token JsonToken.START_ARRAY):

Exception in thread "main" org.springframework.web.client.RestClientException: Error while extracting response for type [class com.custody.sdk.fireblocks.model.GetUsersResponse] and content type [application/json;charset=utf-8]; nested exception is org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize value of type `com.custody.sdk.fireblocks.model.GetUsersResponse` from Array value (token `JsonToken.START_ARRAY`); nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize value of type `com.custody.sdk.fireblocks.model.GetUsersResponse` from Array value (token `JsonToken.START_ARRAY`)

openapi-generator version

I am using 6.2.1, the gradle plugin
id("org.openapi.generator") version "6.2.1"

OpenAPI declaration file content or url

https://docs.fireblocks.com/api/v1/swagger.yaml?_gl=1*mm7ekh*_ga*ODA4NjE0NzAyLjE2NzQ2NjM3MDE.*_ga_D39L1D2ZX2*MTY3OTk1NTAxOC42OC4xLjE2Nzk5NTUwMjguNTAuMC4w

Generation Details

Below is the configuration for the code generation:

openApiGenerate {
    generatorName = "java"
    inputSpec = spec
    outputDir = generatedCode
    apiPackage = "${package_name}.controller".toString()
    invokerPackage = "${package_name}.invoker".toString()
    modelPackage = "${package_name}.model".toString()
    generateAliasAsModel = false
    generateModelTests = false
    generateModelDocumentation = false
    generateApiTests = false
    generateApiDocumentation = false
    skipValidateSpec = true
    configOptions = [
            sourceFolder: "src",
            dateLibrary: "java11",
            library: "resttemplate",
            hideGenerationTimestamp: "true"
    ]
}```

##### Steps to reproduce

./gradlew build 
or
./gradlew openApiGenerate

and then 

./gradlew run

Start with the OpenAPI declaration URL and the Gradle openApiGenerate configuration, then compare the usersGet response schema with the generated UsersApi, GetUsersResponse, and ApiClient classes. Reproduce with ./gradlew openApiGenerate and ./gradlew run, and trace the response type used by the RestTemplate client. Done means the generated client handles the documented response shape without the shown Jackson deserialization error.