User name by ID

Write a python program to print the user name of user using user_id. user_id is given in the file name "id.txt" resides in the same folder as python program files. The output of the python program is only user name of user. For example, if the manager id(user_id) is "1001". Then output must be only RUBY only.

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Database schema

CREATE TABLE "public"."product" (
    "product_id" varchar(25) NOT NULL,
    "category_id" varchar(20) NOT NULL,
    "product_name" varchar(255) NOT NULL,
    "price" int4 NOT NULL,
    "quantity" int4 NOT NULL,
    PRIMARY KEY ("product_id")
);

CREATE TABLE "public"."payment" (
    "payment_id" varchar(20) NOT NULL,
    "user_id" varchar(20) NOT NULL,
    "order_id" varchar(20) NOT NULL,
    "payment_date" date NOT NULL,
    "amount" float8 NOT NULL,
    "payment_method" varchar(255) NOT NULL,
    PRIMARY KEY ("payment_id")
);

CREATE TABLE "public"."categories" (
    "category_id" varchar(20) NOT NULL,
    "category_name" varchar(255) NOT NULL,
    PRIMARY KEY ("category_id")
);

CREATE TABLE "public"."reviews" (
    "review_id" varchar(20) NOT NULL,
    "product_id" varchar(20) NOT NULL,
    "user_id" varchar(20) NOT NULL,
    "rating" int4 NOT NULL,
    PRIMARY KEY ("review_id")
);

CREATE TABLE "public"."users" (
    "user_id" varchar(20) NOT NULL,
    "user_name" varchar(255) NOT NULL,
    "email" varchar(255) NOT NULL,
    "mobile_no" varchar(20) NOT NULL,
    "billing_address" varchar(255) NOT NULL,
    PRIMARY KEY ("user_id")
);

CREATE TABLE "public"."address" (
    "user_id" varchar(20) NOT NULL,
    "street_address" varchar(255) NOT NULL,
    "city" varchar(255) NOT NULL,
    "state" varchar(255) NOT NULL,
    "pin_code" int4 NOT NULL,
    "country" varchar(255) NOT NULL,
    PRIMARY KEY ("user_id")
);

CREATE TABLE "public"."orders" (
    "order_id" varchar(20) NOT NULL,
    "product_id" varchar(20) NOT NULL,
    "user_id" varchar(20) NOT NULL,
    "quantity" int4 NOT NULL,
    "date_ordered" date NOT NULL,
    PRIMARY KEY ("order_id")
);