EC2デプロイの際の、rake db:create RAILS_ENV=productionに対するエラー

前提・実現したいこと

Ruby on Rails の初学者です。

https://qiita.com/naoki_mochizuki/items/5a1757d222806cbe0cd1
Qiitaのこちらの記事を参考にAWSのEC2を使って、Railsアプリをデプロイしようとしているのですが、
rake db:create RAILS_ENV=productionコマンドを実行した際にエラーが出てしまい、前に進みません。お手数ですが、ご教示下さると有り難いです。

発生している問題・エラーメッセージ

$ rake db:create RAILS_ENV=production
Mysql2::Error::ConnectionError: Access denied for user ''@'localhost' to database 'app_production': CREATE DATABASE `app_production` DEFAULT CHARACTER SET `utf8`
Couldn't create 'app_production' database. Please check your configuration.
rake aborted!
ActiveRecord::StatementInvalid: Mysql2::Error::ConnectionError: Access denied for user ''@'localhost' to database 'app_production': CREATE DATABASE `app_production` DEFAULT CHARACTER SET `utf8`


Caused by:
Mysql2::Error::ConnectionError: Access denied for user ''@'localhost' to database 'app_production'

Tasks: TOP => db:create
(See full trace by running task with --trace)

該当のソースコード

databaseyml
1# MySQL. Versions 5.1.10 and up are supported.
2#
3# Install the MySQL driver
4#   gem install mysql2
5#
6# Ensure the MySQL gem is defined in your Gemfile
7#   gem 'mysql2'
8#
9# And be sure to use new-style password hashing:
10#   https://dev.mysql.com/doc/refman/5.7/en/password-hashing.html
11#
12default: &default
13  adapter: mysql2
14  encoding: utf8
15  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
16  username: root
17  password: password
18  socket: /tmp/mysql.sock
19  host: localhost
20
21development:
22  <<: *default
23  database: app_development
24production:
25    <<: *default
26    database: app_production
27    username: root
28　　password:
29# Warning: The database defined as "test" will be erased and
30# re-generated from your development database when you run "rake".
31# Do not set this db to the same as development or production.
32test:
33  <<: *default
34  database: app_test
35
36# As with config/secrets.yml, you never want to store sensitive information,
37# like your database password, in your source code. If your source code is
38# ever seen by anyone, they now have access to your database.
39#
40# Instead, provide the password as a unix environment variable when you boot
41# the app. Read http://guides.rubyonrails.org/configuring.html#configuring-a-database
42# for a full rundown on how to provide these environment variables in a
43# production deployment.
44#
45# On Heroku and other platform providers, you may have a full connection URL
46# available as an environment variable. For example:
47#
48#   DATABASE_URL="mysql2://myuser:mypass@localhost/somedatabase"
49#
50# You can use this database configuration with:
51#
52#   production:
53#     url: <%= ENV['DATABASE_URL'] %>
54#
55production:
56  <<: *default
57  database: app_production
58  username: app
59  password: <%= ENV['AWS_PRACTICE_DATABASE_PASSWORD'] %>

試したこと

エラー内容で検索し、Qiitaなどの記事を参考にして、　host:db => host:localhostに変更、
またpasswordが未記入であったため追加。
しかし、再び同じエラーが出てしまう。エラーの内容を確認して、MYSQLのcharsetの設定に問題があるのではと思い検索するが、関連記事が中々見つからず。