Only require one MultiBaas API Key

[n0thingness]

Blocked by https://github.com/curvegrid/multibaas/issues/2664

[daenamkim]

FYI, I just left this comment to revisit this later.
When I had tested getHost() in provider.ts from a different work, I got an error as follows:

RangeError: Maximum call stack size exceeded
    at wrapSafe (internal/modules/cjs/loader.js:1071:16)
    at Module._compile (internal/modules/cjs/loader.js:1121:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1177:10)
    at Module.load (internal/modules/cjs/loader.js:1001:32)
    at Function.Module._load (internal/modules/cjs/loader.js:900:14)
    at Module.require (internal/modules/cjs/loader.js:1043:19)
    at Object.require (internal/modules/cjs/helpers.js:77:18)
    at Function.load (/Users/daenamkim/Developments/workspace/curvegrid/PUBLIC/truffle-multibaas-plugin/node_modules/@truffle/config/src/index.ts:205:41)
    at Function.detect (/Users/daenamkim/Developments/workspace/curvegrid/PUBLIC/truffle-multibaas-plugin/node_modules/@truffle/config/src/index.ts:191:26)
    at Object.getConfig [as default] (/Users/daenamkim/Developments/workspace/curvegrid/PUBLIC/truffle-multibaas-plugin/lib/config.js:41:44)
    at new Provider (/Users/daenamkim/Developments/workspace/curvegrid/PUBLIC/truffle-multibaas-plugin/lib/provider.js:46:69)
    at Object.<anonymous> (/Users/daenamkim/Developments/workspace/curvegrid/looking-glass-early-access/solidity/truffle-config.js:32:14)
    at Module._compile (internal/modules/cjs/loader.js:1157:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1177:10)
    at Module.load (internal/modules/cjs/loader.js:1001:32)
    at Function.Module._load (internal/modules/cjs/loader.js:900:14)
    at Module.require (internal/modules/cjs/loader.js:1043:19)
    at Object.require (internal/modules/cjs/helpers.js:77:18)
    at Function.load (/Users/daenamkim/Developments/workspace/curvegrid/PUBLIC/truffle-multibaas-plugin/node_modules/@truffle/config/src/index.ts:205:41)
    at Function.detect (/Users/daenamkim/Developments/workspace/curvegrid/PUBLIC/truffle-multibaas-plugin/node_modules/@truffle/config/src/index.ts:191:26)
    at Object.getConfig [as default] (/Users/daenamkim/Developments/workspace/curvegrid/PUBLIC/truffle-multibaas-plugin/lib/config.js:41:44)
    at new Provider (/Users/daenamkim/Developments/workspace/curvegrid/PUBLIC/truffle-multibaas-plugin/lib/provider.js:46:69)
    at Object.<anonymous> (/Users/daenamkim/Developments/workspace/curvegrid/looking-glass-early-access/solidity/truffle-config.js:32:14)
    at Module._compile (internal/modules/cjs/loader.js:1157:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1177:10)
    at Module.load (internal/modules/cjs/loader.js:1001:32)
    at Function.Module._load (internal/modules/cjs/loader.js:900:14)
    at Module.require (internal/modules/cjs/loader.js:1043:19)
    at Object.require (internal/modules/cjs/helpers.js:77:18)
    at Function.load (/Users/daenamkim/Developments/workspace/curvegrid/PUBLIC/truffle-multibaas-plugin/node_modules/@truffle/config/src/index.ts:205:41)
    at Function.detect (/Users/daenamkim/Developments/workspace/curvegrid/PUBLIC/truffle-multibaas-plugin/node_modules/@truffle/config/src/index.ts:191:26)
    at Object.getConfig [as default] (/Users/daenamkim/Developments/workspace/curvegrid/PUBLIC/truffle-multibaas-plugin/lib/config.js:41:44)
    at new Provider (/Users/daenamkim/Developments/workspace/curvegrid/PUBLIC/truffle-multibaas-plugin/lib/provider.js:46:69)
    at Object.<anonymous> (/Users/daenamkim/Developments/workspace/curvegrid/looking-glass-early-access/solidity/truffle-config.js:32:14)
    at Module._compile (internal/modules/cjs/loader.js:1157:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1177:10)
    at Module.load (internal/modules/cjs/loader.js:1001:32)
    at Function.Module._load (internal/modules/cjs/loader.js:900:14)
    at Module.require (internal/modules/cjs/loader.js:1043:19)
    at Object.require (internal/modules/cjs/helpers.js:77:18)
Truffle v5.1.66 (core: 5.1.66)