Composer require error

[monaw]

Description of the bug
I am running into a very similar error that was reported in this closed issue:

$ composer require acquia-pso/dst-entity-generate

In PackageDiscoveryTrait.php line 327:
                                                                               
  Could not find a version of package acquia-pso/dst-entity-generate matching  
   your minimum-stability (stable). Require it with an explicit version const  
  raint allowing its desired stability.
[...]

and i did do the solution recommended for the previous issue, specifically add the repo by modifying the repositories section of composer.json:

$ composer config repositories.acquia-pso vcs https://github.com/acquia-pso/dst-entity-generate

which generated the following entry in my composer.json:

    "repositories": {
        "acquia-pso": {
            "type": "vcs",
            "url": "https://github.com/acquia-pso/dst-entity-generate"
        },
        "0": {
            "type": "composer",
            "url": "https://packages.drupal.org/8"
        }
    },

But the composer require command is still failing with the same error.

what did i miss? i admit i'm just a casual user of composer so maybe there is something about composer that i don't understand? anyone's help is greatly appreciated!

How to reproduce the bug?
I followed the steps outline in the documentation...

[monaw]

is the composer.json correct? what's the proper branch or release tag of the code? because now i'm having a new error which suggests the main branch isn't correct:

$ composer require acquia-pso/dst-entity-generate dev-main
./composer.json has been updated
Running composer update acquia-pso/dst-entity-generate
Loading composer repositories with package information
Updating dependencies                 
Your requirements could not be resolved to an installable set of packages.
 Problem 1
  - Root composer.json requires acquia-pso/dst-entity-generate dev-main, found acquia-pso/dst-entity-generate[dev-generate-layout-canvas-field-of-site-studio, ..., dev-paragraph-fields] but it does not match the constraint.
Installation failed, reverting ./composer.json and ./composer.lock to their original content.
composer [require acquia-pso/dst-entity-generate dev-main] failed, composer command failed: exit status 2. stderr=

all help is appreciated!

[monaw]

ok, rereading the documentation, i updated my composer.json:

    "repositories": {
        "acquia-pso": {
            "url": "https://github.com/acquia-pso/dst-entity-generate.git",
            "type": "git"
        },
        "0": {
            "type": "composer",
            "url": "https://packages.drupal.org/8"
        }
    },

but still getting the same error:

$ composer require acquia-pso/dst-entity-generate

In PackageDiscoveryTrait.php line 327:
                                                                               
  Could not find a version of package acquia-pso/dst-entity-generate matching  
   your minimum-stability (stable). Require it with an explicit version const  
  raint allowing its desired stability.

[monaw]

ok, finally this command worked for me to solve the above version problem:
composer require acquia-pso/dst-entity-generate dev-master
next problem is that drush 11 isn't supported by the composer so i had to downgrade to drush 10...can drush 11 be supported?